Statistics Essays

Similarly, the children information is taken from minimum to maximum. Furthermore, ‘Number of persons living in this household indicates minimum value of “1” and maximum of “9”, with mean value of 3.06 and standard deviation of

John Darsee’s case whereby he was observed labeling data recordings "24 seconds," "72 hours," "one week," and "two weeks when in reality only minutes had transpired. This prompted his mentor Braunwald to investigate his other research where some data were

Basically, the biostatistics released is also useful in helping public health surveillance which is an ongoing process and assists in prevention and controlling of possible foodborne disease as well as injury. Epidemiology on the other hand is a primary science concerned

The retirement age has become a more active phase in life where citizens are responsible for looking at their pension and health. We commission a study to evaluate the dynamics of the senior citizens of the UK aged between 50 to 99 years, in regard to their health and income. World Health Organization has been promoting healthy ageing as people’s ability regardless of age to have a healthy living, socially inclusive lifestyle and safe living.

with a standard deviation of 4.8. Tests are conducted on a new sample of 75 cars using the gasoline plus the additive. Which statistical test should be used to determine whether the additive results in more miles per gallon? B. A researcher wants to determine whether

The most important assumption for the OLS model is that the dat set need to follow a normal distribution. We therefore had to check whether our data set followed a normal distribution. It is clear that the data seems to come from a

Statistics, a branch of math, has been in vogue for ages in one form or other. In modern times, it has numerous applications in personal or community solutions. The paper explores how it is applied in our daily life or how it can help us in our planning processes to better our life. Often, I am asked the question of where I stand on an average basis in the class. 

The subgroup means of the 24 samples varies very much from centerline, and not all of them lie within the range of variation marked out by the upper and lower control limits. Therefore, the process is not under statistical control. Figure 2 shows the R-chart. The

The developed model from the production scenario stipulates that the company’s best strategy is to certify that at any given production term, the

The assumption of the study is that there is a correlation between all the variables and IQ. It also makes the assumption that the mean and the deviation of the population sample is unknown From the statistical analysis

Respiratory therapy is a branch of science that deals with the airways malfunction and therapist help individuals with complications such as asthma, chronic obstructive pulmonary disorder among many other related cardiac and lung dysfunctions. To provide appropriate medical care and education to the patient.

The author states that it is evident that the sample provides enough evidence to support the claim that potato fried in the canola oil has are more preferred compared to the chips fried in animal fat or baked chips. From the analysis of both the t-test and Mann Whitney U test, it is evident that there exists a significant difference in the average time.

For instance, if X is an Oil Refining Company, crude oil yields petrol, oil, paraffin oil, asphalt. Given the nth unit production

The author states that in business, many situations require the use of only two options such as like or dislike, yes or no, etc. In such business situations, the proportion is used for comparison. Collecting proportion data is simple and straightforward. Customers, people, or employees can easily say whether they like or dislike certain things.

This factor analysis is a statistical phenomenon which determines the variable’s effect on one another. Factor analysis has developed in psychometrics and is related to factors dealing with large data’s. There are different variables that affect marketing and productivity. These informative data analysis will reveal the company’s outline.

In the last column, the product of frequency and the square of mid-point of salary is computed for each salary range. The sum of all these products is computed (as 542825) and divided by size of the distribution (20) to

To downsize the variables included, Motivation of Marathoners Scales (MOMs) survey data with important motivators being measured in sub-scales of physical health motives, achievement motive, social motive, and

The data cannot determine that the null hypothesis is false. On the other hand, this probability value still does not prove the truth of the null hypothesis. This often occurs because a researcher, in some cases, cannot determine a small effect from a null effect. (Interpreting Non-Significant Results, n.d.) 

The author states that the relevant data for the research design will be taken from the United States Statistical Abstracts specifically details regarding incidents of crime and safety concerns in American public schools. This brief paper will illustrate both an understanding of basic statistical processes and a possible experimental approach.

ty of error for each comparison made; the chances for type I error to occur across a large number of comparisons keeps increasing exponentially with the number of comparisons (Guilford, & Fruchter, 1973). For three groups, there will be 3 comparisons; for four groups there will

The uncertain factor that will reverse her assumption is the trend of the number of students watching the game. If the number declines, revenue, and all assumptions are affected. Sales will be affected when repeat customers are not satisfied with the product. If a customer feels that the taste of the food is not good, they will not order again.

The factors are used to assert the viability of the hypothesis statement. Random sampling does not portray bias to any part of the population (Duttalo, 89). Convenience sample does not give a true analysis of the population because researchers take what is convenient for them.

halted the global financial and economic markets, the statistics that relate the GDP and directly what affect people’s lives, house index is very important. Many economist, and global and government agencies such as the International Monetary Fund and the Federal Reserve of

From the econometric model adopted by Acemoglu, Johnson & Robinson (2001), the following questions will be answered appropriately. The coefficient estimate (β1) measures how economic growth increases due to the increase in institutions ` quality.

In the analysis, it is also found out that the banks particularly HSBC are willing to give the company a loan. From the analysis, it is clear that USASuperCars can avoid the loan offer from the HSBC bank. However, the sales manager in the

The author states that the most common data problem likely to be encountered in a data analytics project is the duplication of entries. The analysis involves the gathering of large amounts of data. Duplicated data lowers the fidelity of an analytics project, and if it occurs in large enough instances can affect the integrity of the project.

Data sets were processed through statistical software to identify whether the costs of schooling and the fiscal budget for education can affect the rate of enrollment. The results show that while the average rate of tuition fees and the cost of the board has significant effects on enrollment rates in higher education, other factors were not able to show their significance.

prior to undertaking the voyage because as case facts revealed, “by registering a group of neighbors, rather than isolated families, the agent increased the likelihood that his signees would not stray to the equally enticing proposals of a competitor” (The Voyage of the St.

The paper shows that travelers to Cuba are often reported to avoid untreated water sources, junk foods and under or over-cooked foods. Accordingly, the American Health Organization reported that people visiting the place as tourists are also affected by the disease, reporting 51 non-fatal cholera cases recently.

Notably, operations research has played a significant role in the decision making process on the use of resources in an organization. This has

by the US National Fire Protection Association, NFPA show that Americans have indeed appreciated the importance of that this device plays in ensuring their safety as 24 out of 25 of the surveyed homes have at least one fire alarm (Ahrens, 2014). This representing about 96% of

The keypads form the physical interface that can be understood by human beings. However, below the keypads are electrical contacts that are activated every time any keypad is pressed. The aim of this paper is to

This variable may be considered a ratio level variable because of its attributes. First, differences between different levels of ratio level variables have the same meaning (Rubin, 2009, p. 24). That is, the difference in

The approach discussed in the paper would provide a sufficient amount of data to be part of statistical analysis like a repeated measures t-test that would provide precise information about the significance of any difference between the recorded and non-recorded conditions. I could have the data recorded by another person, thereby eliminating the possible confounds associated with self-reporting.

Moreover, the vertex possessing the highest profit is the maximization points while the vertex with the lowest points is the minimization points There is assumption that conditions of certainty occur, which implies that the prevailing numbers within the objective

-1.99 is significant, in this study because it falls in between the 1 tail percent of 0.025. This is because df is 169 and alpha level is 0.05. The value -0.99 progressively becomes more significant as this value becomes smaller and smaller from 0.05.

This is opposed to forward and backward selection which are very efficient in such situations and many others (Bruce, 2011). Many other people do not share the same opinion as Bruce Ratner: many computer data analysts find stepwise selection to be very efficient and good to

d drives one to find out the reported cases of the encroaching diseases in a population on specific time at birth by Obstetrics of Gynecologists (Keir and Krebs 129). To determine the Prevalence of Down Syndrome diagnosis, it was important to determine how many children are born

Significance levels depict the likelihood of a result being true (Creative Research Systems, 2012). For example, suppose a survey is undertaken to determine if there exists a difference in preferences with respect to

Please note when a value appears in SPSS as .000, it is truly p

 (Note: If you do not have a job where measures are available to you, ask someone you know for some examples, or conduct outside research on an interest of yours, or use personal measures.)” The paper will explore the above questions in detail. First

Within the sample, 46% were of machine type 3 which had the lowest rating of 155 parts per minute. 24% of the sample was of type 1 which had the highest rating of 700ppm. However, 30% of the sample was of machine type 2 which had

Dell's supply chain is today's model of technology-based producers because of its purposive approach to handling supply and related issues. To meet the growing competition, Dell Chain has established a direct sales approach. In this approach, the company uses a number of platforms to ensure that they reach the customers directly and avoid wholesalers and retailers.

It is evidently clear from the discussion that a z-test is used to compare population mean with a standard or for comparing the means of two populations when the population standard deviation is known. It is also used for comparison of a proportion with a standard proportion or for comparing two proportions.

Given the numbers $1, $1, $1, $1, $2, $2, $2, $3 and $14, the mean is $3, the model is $1 and the median is $2. The use of the mean as a measure of central tendency has its advantages such as it being the most popular measure used and it is useful when comparing sets of data (Oswego City School District Regents Exam Prep Center, n.d.).  The major drawback of using the mean is that it is affected by extreme values.

As for the cohort research design, a study is to be conducted over a timeframe, and it has to involve a member of a population as a representative or

A multiple regression analysis designed using these variables would have the null hypothesis that there is no correlation between the IBI time and each of predicting measures (baby age, mother age, and story word count), which would be indicated by

The effectiveness of cognitive-behavioral therapy in the treatment of PTSD is tested using single client/system designs which imply that there should be a notable change in the status of the client at the end of the intervention. This paper follows the intervention through three phases; repeated measurement, baseline phase, and treatment phase.

Sampling refers to a statistical technique that entails the selection of individual observations with an aim of obtaining some desired level of information about a population parameter, sampling is mainly used for statistical inferences (Thompson, 2012). Sampling involves four major sample designs namely simple random sampling, systematic, stratified, and cluster sampling.

However, with the use of frequency distributions we can easily get exact figures for every task or data collected for each and every employee (Lewis, 2006). Making use of frequency distribution tools like graphs and