Statistics Essays

conclusion which later are used to make rational decisions, clear things out or expand human knowledge and understanding of underlying phenomenon (Osborne & Waters, 2002). In this case, how a country engages in international trade through imports and exports is one area that

She thought that in principle she should be able to monitor production rates for the types of machines, identify any machines that seemed to be in need of adjustment, and characterize the amount of downtime to be expected. Accordingly, she extracted one day's production records for 116 presses at her facility.

However, if receiving a jolt of electricity on one-occasion affects the following occasions than probability (p) will not remain

Weight is very important information when it comes to games. Some games require heavy weights while others require normal weight. Therefore, this paper utilizes the most appropriate data analysis tools to analyze the weights of the Tiffin University football team. From the box and whisker plot, the sample data is positively skewed.

The variables are sometimes called decision variables because the problem is to decide what value each variable should take. Typically, the variables represent the amount of a resource to use or the

The Type I error is rejecting the null hypothesis that the mean weight of a package is 20 ounces when it is in fact true. In other words, we decide that the mean weight of a package is different from 20 ounces, but in reality, it is not different from 20

The application of statistical knowledge spans across almost all modern academic and professional disciplines. However, learners in many non-mathematical disciplines have difficulty differentiating the exact tests to apply, despite knowing the kind of results they desired at the end of a particular analysis.

hat people come in the beach to engage into.Apparently, this report is mandated with task of documenting the findings based on the observational study carried out. However, it should be noted that there were challenges encountered during the process and more of this will be

20. Equivalence of hypothesis Test and confidence Interval. Two different simple random samples are drawn from two different populations. The first sample consists of 20 people with 10 having a common attribute. The second sample consists of 2000

Managers, therefore, bear this responsibility of ensuring that the right figures and procedures are applied while entering the numbers so that the outcomes can reflect the true form of the business. The manager, therefore, needs to be familiar with arithmetic formulae

On the other hand, the mean guilt rating was 4.0317 with a standard deviation of 1.76862 and a standard error for the mean of 0.22282 for non-witnesses. The mean value for the punishment for

In the majority of the published researches on SPC surveyed during the literature review, the take-off point of the studies was concentrated on gaps in existing knowledge from literature. Another original contribution of this study, therefore, is its use of profiling as a springboard for proposing an MSPC-based intervention.

riable occurring before the presumed effect or the second variable), manipulation of the independent variable, research into the relationship between the independent and dependent variable, the exclusion of rival hypotheses, and the use of random assignment in at least two

As shown in table 1, the total number of subjects involved in the study was 30 participants. The mean age of the participants was 42.13 years with the minimum and maximum ages of the respondents being 24 and 60 years. The mean of the EDSS score

Therefore, we need to estimate the population parameters y-intercept (β0) and slope (β1) using sample statistics b0 and b1. In actual, we will not see that the line passes

is the coefficient for the In(size) and the value is 0.058 implying that there exists a positive relationship between the dependent variable (ln(GDP percapita)) and the independent variable (In(size)). As such, a unit

In organizations, both the physical infrastructure and human resources play a crucial and complementary role. Speaking of organizational infrastructure, it has to facilitate the streamlining of operational processes and support as well as motivate the employees. As Townsend (2006) states “organization infrastructure links goals, activities and people through planned processes and systems”.

(1% level of significance) A bank claims that 60% of people who apply for a personal loan will be granted it. However, a random sample of 500 loan applicants contains only 250 which are successful. Does this suggest that the

We conducted a study on the mean annual wage of management of companies and enterprises in the US. We used secondary data to evaluate our study collected by the U.S. Bureau of Labor Statistics and we studied the salaries of workers at the management level. I choose to study the data to understand the different perks paid in the US and evaluate the trend of top management salaries; with a sample, N = 61.

For the TI, you will want 2-PropZTest. Then select the appropriate alternative (not equal), and Calculate then enter. The output will have the test statistic (z), p-value (p), sample p values, weighted p (), then repeat of sample sizes. To compare the

Generally speaking, in today’s management sciences, qualitative and quantitative analyses are used in conjunction. Even if there are a lot many qualitative concepts present concerning a particular business problem, statistical interpretations are necessary so that business stakeholders can be informed and convinced.

The author states that when 3 members are then chosen then in random the probability that they are democrats. The first time picking the name the probability is of picking a democrat is o.47 or 47/100. The second time of picking, the total number of names has now reduced to the 99 hence; the probability of picking a democrat member is 46/99.

The first null hypothesis is rejected at 0.05 significance level as the associated P-value is found to be less than 0.05. It shows that there is a significant difference amongst mean ages of male and female employees. The second null hypothesis is also rejected at 0.05 significance level as the associated P-value is found to be less than 0.05.

Splitting up a variable into its various components would effectively change the effect it had on the model (Garavaglia and Sharma, 2000). Therefore, for the model we have, discontinuing the continuous form of the variable “fiction” and introducing dummies would result in a reduced effect of the variable on the response (read). 

To derive any meaning or pattern from such raw data, methods such as data mining is used. Data mining is a set of statistical techniques that aim to identify trends, patterns, and relationships in data. Data mining activities are of three types: Descriptive: interviewing the data stored to identify patterns and relationships.

Regression, which identifies the numeric connection between the variables, is discussed in detail along with the method to formulate a straight line regression equation using the Least Squares method. Hence the method to compute the coefficient of determination which gives a numeric value of the goodness of fit is included in the report.

The author states that experience is the material studied and interpreted and is obtainable from a broad range of means including interviews, examination, or personal experience. There is a considerable quantity of interest in the possible contribution of qualitative methods in key psychological journals.

The study took a sample of 80 patients who were affected by chronic ulcer but had now healed, for the period 2006 to 2009 (Finlayson, Edwards & Courtney, 2011). The data regarding their

Using StatCrunch, construct a scatterplot that shows the relationship between the two variables. Copy and Paste your work from StatCrunch into your Word document submission. Verbally describe the direction and magnitude of the relationship. Compute the correlation coefficient (Pearson’s r) in StatCrunch to summarize the relationship for the data presented in Exercise 13.

As the study stresses international politics defines the politics of the global community in a fairly narrow sense mainly about diplomacy, as well as state relations and other political units. The discipline of international politics draws intellectual materials from the fields engineering and technology, economics, international law and history.

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

The dependent variable was life without parole “LWOP” while the independent variable was the defendant’s age. There were two main variables to be examined in the present study; LWOP and the defendant’s age. The vignettes were randomly assigned to the participants. The participants recorded their responses for variable LWOP on a 5-point Likert-type scale.

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

Sampling is the choosing of a sample from the whole of the target population, and the results of the sample can then be generalized for the whole of the target population. The number of samples chosen for this survey is 12, and they all belong to either the sales support analyst or the customer billing department of Etisalat Telecom.

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

Financial status influences the well-being of an individual. Financial status affects human functioning, including physical and mental health. That is, inadequate finances can result in depression in an individual. In this regard, depression and financial status are positively correlated hence they affect well-being across the lifespan.

Generally, the study adopted the semi-weighted dietary records as a reference method (8). The study used the SAS statistical software to carry out the statistical analyses of the data (66). Further, all the analyses were performed on log-transformed values thereby accounting for any non-normality (77).

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.

Metadata describes other data. It provides information about certain items content. For example, an image may include metadata that describes how large the picture is. (Liu,2007) in his definition, he views metadata as structured information that describes or otherwise makes it easier for it to be retrieved, use or manage an information resource.

Knowledge with regard to complaint behavior offers valuable insights into important areas, more particularly in the identification of common service problems. 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 losing clients.

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

Individuals working with statistics use statistical methods 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 an individual gets to play in the backyard of every other individual.

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

Determination of wages and other packages for employees requires excellent communication because most employees view their employers with suspicion. Lauren ought to communicate the full criteria it uses to pay its employees the severance package and extend the same to Western Company employees whose jobs have been severed following the buy-out.

Learning institutions admit new students into various academic programs. For purposes of planning, it is always important that the institutions understand the demographics which affect their student entrance demographics. Incidentally, there are lots of variables that dictate entrance. This paper assesses the role of various variables in the entrance.

In this paper, we are interested in the relationship between the factors in purchasing soap and the education level of the person making the purchase. In this study, the correlation between the factors in purchasing soap and the education level of the person making the purchase will be evaluated. The factors that are involved in this study are; the level of education, and the factors impacting the purchase.

The simplicity of vectors makes it the best choice for beginners. The restriction on the type of data makes it suitable for numeric data analysis of one variable. Lists are the data structure of choice for multivariate and tabular data. Saving and loading large amounts of data from files is easier with lists. Lists and vectors both  have their own strengths and weaknesses

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