Statistics Essays

As the test statistic value was less than the z-value, we rejected the null hypotheses that mean annual income is $50,000 and accepted the alternate hypotheses of income to be less than $50,000. This shows that the manager was indeed correct in his or

You can only fund one of the two. Patients and their families are anxiously waiting for the Board of Directors to make a decision on which of the two can be funded. Part I: Your first task it to do the following

If there are 36 different graphics symbols available, how many personalized license plates are possible? 9. The manufacturers of a new electronic tablet surveyed 250 customers and obtained the following

Before conducting the study, informed consent was first sought from the potential participants who mainly included members of the public. The study recruited a total of 187 participants of whom 76 were assigned the vignettes about a 13-year old and 111 were

The paper describes the survey instrument, the measurement levels, the IVs and DVs nature, model’s assumptions, robust of each assumption, computations,

The standard deviation of the level of happiness is 2.644619961. The Skewness and kurtosis of the sample data is 3.727494666 and 15.41579212 respectively. With a skewness of 3.727494666, the values of happiness are concentrated on the

Hence there is no statistical independence between industry categories and age group. e) From the confidence interval, we conclude that the Australian popliteal height is not significantly

These two variables are part of socioeconomic factors that affects the psychological health of an individual. Inadequate finances can be an act of poverty which in turn considered a risk factor for declines

s accomplished by subjecting the participants to a comprehensive self-administered diet history questionnaire and a brief-type diet history questionnaire (BDHQ). The study adopted the semi-weighted dietary records as a reference method (8). The SAS statistical approach provided

The author states that the independent t-test determines whether unknown means of two populations are different based on independent samples drawn from each population. Generally, the term ‘population’ (N) in statistics refers to the entire pool from which an investigator obtains a statistical sample.

This allows improved service design/delivery, understanding perceived service quality by customers as well as in strategic planning. Arguably, it is important to encourage dissatisfied clients to complain to avoid the risks of

The company samples 7 batches of 25 and gets the following weights. The production process is in control, as all the points fall within the lower and upper control limits. However, there appears an increasing

and thinking to a broad range of social, scientific, and business endeavors in such areas as biology, economics, astronomy, education, marketing, engineering, psychology, genetics, marketing, sports, public health and many others. The best idea concerning a statistician is that

From the table, we observe the coefficient for the  is 0.36488; this implies that for any unit change in  we would expect the dependent variable to increase by 0.36488. The coefficient for the explanatory variable is significant at 5% significance level. We can

Though seemingly late, all staff ought to know that the following factors are used to construct a linear regression model that has been used to predict the pay-off for laid off workers. Using

This paper assesses the role of various variables in entrance. The variables considered include academic level, age group, marital status, and employment status. Age is a major determinant factor in lots of case and this is no exception in this research. The

The factors that are involved in this study are; the level of education, and the factors impacting on the purchase. According to Rotter, 1966 the factors in purchasing soaps and the level of education of the person making the purchase. But according to the

This paper seeks to offer a basis for predicting beverage sales for Westar hotel. The paper will use regression analysis to establish a model for predicting sales of the hotel’s beverage sales (Freund, Wilson, and Sa, 2006). The sets of data used in the

The failure in global financial system has led to countries being bankrupt with many banks being closed down (Dean, 2006).There has also been an increase in the cost of living as the financial crises spread across

This paper will review at why an analyst needs to take his/her audience into account while writing a report, and the steps to writing a substantial research report. It is imperative that a researcher know his/her

240). The assignment model facilitates solving transportation problems through the explicit identification of the objective function, the decision variables and the constraints.

This growth rate is said to have doubled that one of 13 years prior (Garfield, 23). The total number of journals verified for the year 1950 was approximately 60,000 while the estimate for the year 2000 was approximately 1,000,000. Price made use of the

R2 measures the proportion of the variation on the dependent variable which is explained by the independent variable in a linear regression model. It also measures how best the regression model fits. Adjusted R2 adjusts the statistics based on

in criminal activities from the rest of society with the belief that it is easier to rehabilitate these individuals and help them find ways to start fresh when they are not faced with the temptations to use underhand methods on a daily basis. Imprisonment also serves as a

Estimation of the sample size starts from table I, where the general level two is matched with category of the batch size where 40,000 units falls, to get N as the code letter. From Table II-A, code N is equivalent to 500, which

During analysis, a group variable is created to accommodate the two groups whose means are being analyzed. Based on the Levenes Test for Equality of Variances, which puts the level of significance (p-value) at 0.229, we use the equal variance

From the data, a hypothesis, which is a possible explanation for the observation made, is formulated. Experiments serve to test the formulated hypothesis, and based on the results, the

Existence of diversified literature on subjects offers contradictory information that that may confuse researchers’ development of hypothesis through determination of dependent variables. An example of the source of the

In addition, this paper will also calculate what proportion of students’ z-scores are below 0.50. The average previous test score of the students was 85.22 and vary from the mean by

The conclusion made by the work is that the firefighter needs to be given proper training to avoid fatalities and professional trainers need to be employed to educate the firefighters in a scientific manner. The

It is an attempt to describe the movements in a variable with regards to movement in other variables. Linear regression is a form of regression which attempts to build a linear model between dependent and independent variables. In a linear equation, generally represents the intercept of the equation while represents the slope of the equation. 

Cohen’s d is to measure effect size and to evaluate the size of the treatment effect that is measured by t2. Cohen’s d is calculated when the boys and girls are tested again.

The use of statistics in reporting research, survey and business findings has often received criticism. This is mainly when there is misuse of the data so that facts are misrepresented and only some part of the observed

Alternatively defined, a statistic is a sample characteristic. There are basically two types of statistics; inferential and descriptive (Anderson, Sweeney & Williams, 1994). While inferential statistics involves the description of the population based on the results drawn

Stratified sampling – the population in this case is divided into groups in a way in which the members of each group have similar characteristics. This is called stratification and the groups are referred to as strata. Random samples

This paper seeks to present an analysis of the intervention process of patients suffering from crisis and the effects of the intervention process on the health of the patients. The

The mode, for example, is suitable for describing data on a nominal scale while for ordinal data; either the mode or the median should be used. The mean is however more suitable for variables on a ratio or interval scale (Hanna and

Additional support and guidance including advice on plagiarism, referencing and the marking system can be found in Social Sciences Assessment Information. These links direct you to policies on certain matters which you need to

25. Paul’s Grocery received 1,000 pounds of onions at $0.11 per pound. On the average, 3% of the onions will spoil before selling. Find the selling price per pound to obtain a

In this project an attempt has been made to forecast milk production using statistical time series modeling techniques – double exponential smoothing and Autoregressive integrated moving average models. Forecasting of milk production enables policy makers and planners to estimate the supply of milk requirement in the future.

That how many household are likely to lie in that bracket? To express the strength of linkage or even co-occurrence between two variables in a range of -1 to

2. The histogram is skewed to the right. This is because its right tail is longer than its left tail. This is also due to the reason that the tail on the right is more positive than the tail on the left. Furthermore this is also due to the fact that values with higher

The author states that the first step in any t-test analysis is setting both the null and alternative hypotheses so that it can be determined whether there is any difference in the two means under study. In this case, our main interest is to know whether there is a difference between the oxygenation levels of the two groups.

This mainly took the form of in-depth interviews, which were administered in sets of 25 for each city in the Budapest Metropolitan Region (130). Leaders and firm managers were the main respondents of the interviews in order to explain their decisions

This is known as a spurious regression since it implies dependence although the variables are independent of one another. The problem will go away if the regression is run in first differences, or a lagged value of Y is

Accurate diagnoses and treatment is the very mainstay of patient-centered medical care (Broyles, 2010). Likewise, the use of statistics one finds the way in which the use of interval variables may help the Federal Qualified Healthcare Center to promote

Hence mean (average) is the appropriate measure for measuring the central tendency. The average salary of the corporate customers is $300,000. The frequency graph with addition of new salary points of $500,000 and $600,000 will affect the skewness of the

A data set is collected for male and female for their age, weight and height, and BMI is calculated. The data set is attached in Appendix A. This paper will

In 2011, the Pearson correlation is zero meaning that the two variables, that is, borrowings and tax revenues are not correlated or they do not cause each other. In 2012, the Pearson correlation (r) is 0.009853 meaning that

Data set consists of n = 30 values shown in Table 1. According to the statistical concept, each value in the set is considered to continuous data. Central tendency of the set, in this investigation, is expressed