StudentShare
Search

# Introduction to Statistics - Essay Example

Summary
If P(Mining&construction and Under 55)=P(Mining&construction)P(Under 55), then the events are independent…

## Extract of sample "Introduction to Statistics"

Download file to see previous pages a) Proportion of affected patients was with the 95% confidence interval for the proportion of stroke patients who become clinically depressed given by . The confidence interval indicates with a confidence coefficient of 0.95 that the true proportion of stroke patients who become clinically depressed lies within this interval.
b) To evaluate the claim of the health magazine, we check whether the confidence interval contains 60% of stroke sufferers. Since 0.60 is within the confidence interval, we conclude that the claim by the health magazine is consistent with the observed data (Mendenhall en Sinchich).
c) The assumptions for the confidence interval to be valid include large sample size to ensure the validity of the normal approximation. The sample size of 79 is large enough to guarantee the validity of the normal approximation.
d) Sample size to be used to achieve a 99% level of confidence that the sample proportion of stroke patients suffering from depression is within 0.025 of the true proportion is computed from the following formula.
b) The main assumption for the validity of the confidence interval computed is that the sample should be drawn from a normal distribution or asymptotically, it should tend to a normal distribution. This assumption is violated since from the boxplot, the distribution of the temperature is right skewed. This is evident from the unequal length of whiskers of the boxplot, with a longer whisker for data to the right of the ...Download file to see next pagesRead More
Cite this document
• APA
• MLA
• CHICAGO
(“Introduction to Statistics Essay Example | Topics and Well Written Essays - 1500 words”, n.d.)
Introduction to Statistics Essay Example | Topics and Well Written Essays - 1500 words. Retrieved from https://studentshare.org/statistics/1595180-introduction-to-statistics
(Introduction to Statistics Essay Example | Topics and Well Written Essays - 1500 Words)
Introduction to Statistics Essay Example | Topics and Well Written Essays - 1500 Words. https://studentshare.org/statistics/1595180-introduction-to-statistics.
“Introduction to Statistics Essay Example | Topics and Well Written Essays - 1500 Words”, n.d. https://studentshare.org/statistics/1595180-introduction-to-statistics.
Click to create a comment or rate a document

## CHECK THESE SAMPLES OF Introduction to Statistics

### Statistics

...?Because there are 50 numbers, we can divide these numbers into groups of 10 (5 groups). Next we subtract the lowest number from the highest number (76 — 16 = 60). After this, we will divide the difference by the number of groups that we came up with (60 / 5 = 12). Once we get the class width (12), we add it to the lowest number in order to get the lowest class limit (16 + 12 = 28). If we keep on repeating this step, we can determine all the appropriate class limits (28 + 12 = 40, 40 + 12 = 52, 52 + 12 = 64, and 64 + 12 = 76). Because these are the maximum limits, we have to subtract 1 from each class limit (16 + 12 — 1 = 27, 28 + 12 — 1 = 39, 40 + 12 — 1 = 51, 52 + 12 — 1 = 63). Now that we have worked this out, we can create... there are 50 ...
1 Pages(250 words)Math Problem

### Statistics

...?Clinically Depressed Adolescents: How Conflict with Parents Impact their Emotional Rigidness through Conflictual Disengagement Concept Paper Submitted to Northcentral University Graduate Faculty of the School of Behavioral and Health Sciences in Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY by LISSETTE GOMEZ Prescott Valley, Arizona April, 2013 Table of Contents Introduction 3 Statement of the Problem 4 Purpose of the Study 6 Research Questions 7 Definition of Key Terms 8 Theoretical Framework 9 Brief Review of the Literature 11 Research Method 28 Operational Definition of Variables 32 Measurement 33 Summary 38 Adolescents present emotionally rigid during conflicts with parents. However, current literature...
4 Pages(1000 words)Essay

### Descriptive statistics/inferential statistics

...Survey Research Select a quantitative article that is related to your research question in which the results of some type of a survey are reported. Examine the demographic statistics and the means and standard deviations for items on the survey. What do they tell you about the sample? Discuss the ethical issues related to gathering demographic and survey data.  The study chosen was the Williams et. al. (1998) study wherein the researchers attempted to evaluate the extent to which patient literacy was related to their knowledge of asthma and effective use of the MDI. The study presents demographic statistics predominantly in the form of frequencies and percentages, and some in the form of means and S.D.’s. The data shows us...
2 Pages(500 words)Assignment

### Statistics

..., particularly in the U.S. This research paper therefore aims at establishing the relationships between the changes in the GDP and house sales. In determining such relationships, this research paper will focus on literature material and the statistical inferences. Resources The link between GDP and the change in the sales of the housing and real estate units is evidenced by the data on the performance if these two variable over time. The data from the department of labor and economics show that these two variables have a strong positive relationship. This is evidenced by the great global economic and financial crisis of 2009 that negatively affected the housing and real estate sector through the housing bubbles. These changes in the GDP...
2 Pages(500 words)Research Paper

### Statistics

...Statistics Introduction Carbon dioxide’s concentration in the atmosphere is changing from time to time across the years. There are a number of evidences which show that the concentration of atmospheric carbon dioxide has been steady increasing globally. This rise is attributed to increasing human and industrial activities across the globe. Unlike moisture in the atmosphere, carbon dioxide is mixed well in the atmosphere thus its circle can go unnoticed due to relatively slow changes. The level or rather the amount of carbon dioxide in the atmosphere is measured easily because it is a greenhouse gas; causing surface warming. Therefore, this paper presents carbon dioxide data and a presentation of its trend over the years. In addition...
4 Pages(1000 words)Essay

### Introduction to statistics

...INTRODUCTION TO STATISTICS By of the of the School Q1: It has been suggested that the use of Railways and Waterways for the internal transportation of goods in Europe is in decline. The data below shows the percentage of goods moved by Railways and Waterways within a country for the years 2000 and 2009. Table 1: Data Country Rail and Waterways 2000 2009 Belgium   22.6 27.1 Denmark   7.9 9.2 Germany   34.7 33.0 Ireland   3.8 0.6 Spain   7.2 3.4 France   24.0 19.0 Italy   11.0 9.0 Netherlands 36.6 36.6 Portugal   7.5 5.7 United Kingdom 10 13.3 (a) Do the data support the suggestion? SOLUTION No; the data does not provide any evidence of decline in the use of Railways and Waterways for the internal transportation of goods in Europe...
2 Pages(500 words)Essay

### Statistics

... due Statistics Assignment Question Summary Statistics Life Expectancy Mean 76.0752 Standard Error 0.257757 Median 76.38245 Mode #N/A Standard Deviation 1.840753 Sample Variance 3.388371 Kurtosis -0.55827 Skewness -0.66657 Range 6.808189 Minimum 71.86361 Maximum 78.6718 Sum 3879.835 Count 51 From the summary statistics, the data is normally distributed with the mean approximately equal the median. (76.0752 ≈ 76.38245). Moreover, the skewness is not statistically different from zero. Question 2 Life expected can be termed as directly influenced by the average income. The scatter diagram shows that higher income earners have higher life expectancy. Note also that the scatter is denser below 35,000. As the number of individuals with less...
2 Pages(500 words)Assignment

### INTRODUCTION TO STATISTICS

...Introduction to Statistics Question Pair-wise correlation The table below shows a pair-wise correlation for the dependent and each of the independent variables in the dataset:   Sales nfull 0.237185 npart 0.050085 hoursw 0.262997 ssize -0.29379 The above output shows sale per square meter has different correlation coefficients with every other predictor variable. For instance, the correlation coefficient of sales per square meter and number of full-timers is 0.237185. This is a weak positive correlation which implies that the two variables increase or decrease together, uniformly. Sales per square meter and number of part-timers have a coefficient of 0.050085 which is a weak positive relationship. The total number of hours worked...
8 Pages(2000 words)Essay

### Introduction to Statistics

... Introduction to Statistics Fall Assignment 6: T-Tests Analyse each one of the three cases below according to the following steps: 1. What is the appropriate test to implement and why? 2. Set up the null and alternative hypotheses. 3. What is the rejection rule? 4. Test at a significance level of 0.05 and present Excel output (copy and paste in Word document) 5. What is the rejection decision? 6. What is the conclusion? Question 1 An investor compares the returns on car manufacturers and energy stocks. He believes that energy stocks perform better. He recorded 2 random samples of 6 returns in each industry. The numbers are given below: Obs. Car manufacturers energy 1 11.5 9.4 2 8.2 17.1 3 3.5...
2 Pages(500 words)Assignment

### Introduction To Human Resource Management

...Running Head: INTRODUCTION TO HUMAN RESOURCE MANAGEMENT Introduction To Human Resource Management [Insert [Insert of Introduction To Human Resource Management Developments during the last decades of the twentieth century have produced what may be termed an era of globalization. As business has continued to globalize or migration of many companies to other economies, one of the most challenging aspects has focused on how UK firms manages its human resources to sustain a competitive advantage. Scholars from several disciplines are addressing these issues-coming at them from the perspective of strategy, cross-cultural management, international business, organizational theory, sociology, and personnel management. It appears... Head:...
7 Pages(1750 words)Coursework

### Introduction of the Euro and the European Constitution in Terms of Framework, Authority, and Aspirations

...Discuss the introduction of the Euro & the European Constitution in terms of framework, ity & aspirations Like all other world bodies, there was a need to bring all the European nations to a single platform. This was all the more needed because the rulers of the respective nations wanted their own particular identity and this brings us to the question that if they needed such an identity what was the need of having European Union (EU)? They could have easily made a body comprising of two or for that matter three countries and enacted their own policies and gone about it in the long run but bringing all the European nations together to a single platform only means that there was a courteous move behind the very same... the introduction of the...
10 Pages(2500 words)Term Paper

### Introduction to Social Science and Counselling

Qualitative research may be taken as a research strategy that employs a naturalistic and interpretative approach to the understanding of the meanings that people attribute to actions, decisions, beliefs, values and the like within their social world and the mental processes that are employed by the respondents to comprehend and interpret the world in which they live. (2). Qualitative research is characterized by the predominant stress on the inductive approach and the generation of theories; rejects the approaches of the natural scientific model and of positivism, which is replaced by stress on the manner in which the social world is interpreted by individuals and incorporates the perspective of social reality as a constantly chan...
7 Pages(1750 words)Assignment

### Abortion Facts and Statistics

Whether legal or not, every year millions of individual women around the world— of all cultural, religious, and economic backgrounds— seek out abortion when they cannot carry a pregnancy to term.

At present almost two-thirds of the world’s women live in countries where abortion may be legally obtained for a broad range of social, economic or personal reasons. When abortion is made legal, available and safe, women’s reproductive health improves. When women can avoid births that are unwanted, mistimed, or too numerous, their children are more likely to survive and be healthy.

It has long been recognized that the number of abortions can be effectively reduced by educating people on...
11 Pages(2750 words)Report

### Mentally Ill People and Their Re-Introduction Into the Workforce

The lay theory proposed in the article states that people who suffer from psychotic disorders are discriminated against when seeking employment and that the culture in China discriminates against these people to a greater degree than a western culture such as the U.S. There have been many inquiries into the difficulties of people with mental illnesses, though this was the first to examine the differences of perception in different cultures. This is the context within which this article exists.

Jason Robert, a researcher from Arizona State University, says on the subject of mental illness that it is necessary to take into consideration biological and socio-cultural factors when making a diagnosis: “My claim is tha...
8 Pages(2000 words)Article

### Introduction to Change Management

Management often follows a “change management process” to change the existing process or activity.
Change management is a systematic approach for dealing with change that takes place in the organization as well as at the individual level. Such change management comprises of three aspects: adapting change, controlling it and finally affecting it. These three aspects of change management were well explained in three stages of change model given by Lewin (1952) and the three stages are “unfreezing”, “change” & “refreezing” (Orlikowski & Hofman, 1997). Another model for change was introduced by Prosci after conducting a research on more than 1000 companies from 59 countries....
7 Pages(1750 words)Case Study

### Introduction to Care Policy

...Running Head: Introduction to care policy Introduction to Care Policy of the of the Introduction to care policy Introduction The term welfare state is used for a country where maximum welfare services come directly from government or its agencies and where the system of government allows the state to promote economic and social well-being of citizens. A welfare state protects its citizens from a number of social problems such as poor health, lack of access to education, unemployment, discriminatory and poor housing. The basic idea is to improve quality of life, reduce inequality and achieve greater social integration. According to the views of Fulcher and Scott (2007), the provision of welfare is described by different amount... Head:...
6 Pages(1500 words)Coursework

### Statistics and Quantitative Methods

The method is also not sensitive to variation in the value of money over time. However, it is easy to use and can be used to make a quick assessment of investment viability using existing data (Groppelli & Nikbakht, 2006: pp. 157-158).

Net present value (NPV) takes into account the value of money over time and uses the present value of future cash flows (Lasher, 2008: p. 426). This present value is compared with the initial investment and decision taken on whether the investment is viable over the long term or not. NPV is, therefore, a difference between the present value and the initial investment. If NPV is positive, the project is viable, and if it is negative, the project may be rejected. NPV uses the discount r...
17 Pages(4250 words)Assignment

### Statistics of Offenders to Commit Suicide

A more serious suicide problem in correctional facilities, which has come to the fore in recent times, is the gender disparity in the cases of prisoner self-harm and attempted suicide. It is rather intriguing that while they comprise only about 5% of the prison population, female prisoners are observed to attempt more self-harm and attempt suicide compared to males. Notably, between 20% and 24% of female prisoners self-harm while between 5% and 6% of male inmates self-harm every year. The study also found out that cases of self-harm were 30 times higher in female prisoners compared with the general UK population rates, which were reported to be at 0.6%. Hence, this study seeks to establish whether or not, female prisoners attempt...
17 Pages(4250 words)Research Proposal

### The Statistics of Abortion in the USA

Despite the emphasis placed on the ethical status of abortion in the United States only surged in the 20th century, the truth is that abortion has existed for a long time in human history. In earlier centuries, women used different techniques to terminate pregnancies if they were categorized as unwanted or risky for the mother. This was the case in many continents a fact that saw abortion a common option in Europe in the 18th century. However, the 19th century brought about a change in the perception of abortion. Laws banning abortion were formulated and reinforced in different regions (Bartkowski et al, 2012). In the United States, the 20th century, was a defining period in the debate surrounding abortion. Prior to 1973, abortion...
6 Pages(1500 words)Case Study

### Introduction to Statistics in the United Kingdom

...﻿Introduction to Statistics in the United Kingdom Purpose of the Book The book has the purpose fo providing learners, among other practitioners, with the statistical knowledge they need to have when conducting different statistical research and analysis. The author defines statistics as one of the most fundamental as well as the basic knowledge that students in the higher education have to get well equipped with. Coolidge (2013) addresses the concepts of statistics, by use of the variables, among another day to day activities and changes that we experience in our lives though very few of us note them. This book looks at the detailed definition and the different roles that are played by statisticians in the research field. It enlightens its...
6 Pages(1500 words)Book Report/Review