We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Nobody downloaded yet

Z / T Statistic Tools in Comparing Means - Case Study Example

Comments (0) Cite this document
Z and T-tests are valuable statistic tools that are used in data analysis. In particular, the two tools are used to determine whether two sets of statistical data are statistically equivalent. For instance, the tests are conducted to determine whether two means from two samples are equal. …
Download full paperFile format: .doc, available for editing
Polish This Essay95.5% of users find it useful
Z / T Statistic Tools in Comparing Means
Read TextPreview

Extract of sample
"Z / T Statistic Tools in Comparing Means"

Download file to see previous pages Z / T Statistic Tools in Comparing Means

The population involved a random sample of 75 men and 50 women blood donors and it involved an analysis of a particular trace element in their blood. The concentration mean of the trace elements is 28 ppm (parts per million) for the men and 33 for the women. The concentration of the trace element in the blood was calculated and found to be 14.1 ppm for the men and 9.5 ppm for the women.
In the two formulas and are the means of the two samples used while Δ is the assumed variation between the sample means while σ 1 and σ 2 are the computed standard deviations of the two samples and n 1and n 2 are the sample sizes.
The calculated z-value was negative because the bigger mean for the women donors was deducted from the smaller value for the males. However, the final figure can be given as 2.37 and not -2.37 because the hypothesized difference between the two samples was zero. The order of the samples thus did not matter and thus the male mean value can be subtracted from the female mean value. An extreme z-score in the analysis whether plus or minus can result to the rejection of the null hypothesis of having no difference (Ted et al).
The area of the standard normal curve culminating from the computed z-score value of -2.37 is 0.0089. Since this test is two-tailed, the figure is multiplied by two to give a probability of 0.0178 implying that the population means of the two samples are equal or the same. Had the test been conducted in at a pre-specified significance levels of say α < 0.05 then the null hypothesis of similar means could have been rejected. ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Z / T Statistic Tools in Comparing Means Case Study”, n.d.)
Z / T Statistic Tools in Comparing Means Case Study. Retrieved from https://studentshare.org/statistics/1663649-z-t-statistic-tools-in-comparing-means
(Z / T Statistic Tools in Comparing Means Case Study)
Z / T Statistic Tools in Comparing Means Case Study. https://studentshare.org/statistics/1663649-z-t-statistic-tools-in-comparing-means.
“Z / T Statistic Tools in Comparing Means Case Study”, n.d. https://studentshare.org/statistics/1663649-z-t-statistic-tools-in-comparing-means.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
Telecom - Verizon Wireless, Sprint, and At&T
These companies make use of the most advanced technologies to sustain in the market. Customer Decision Making Process and Service Encounter Process The activity of acquiring commodities or services to achieve the goals of an association or individual is referred as purchasing.
10 Pages(2500 words)Case Study
Case - Mohammed Vs. E&Z Electronics
Facts The plaintiff, Mohammed, purchased a washing machine from one of the defendants, E&Z Electronics. The washing machine had a defective electrical switch due to which it malfunctioned and resulted in significant bodily injuries and property damages to Mohammed.
5 Pages(1250 words)Case Study
Effective Project Financial Management Tools
The other company is the Arizona Department of Transportation (ADOT), being studied by the Dye Management Group, Inc.. During the study they gathered requirements for project budgeting, researched best practices, designed four financial improvement projects, and developed an implementation plan.
4 Pages(1000 words)Case Study
Case Study #2 (Z and T) (Megastat/Minitab)
Both z and Student’s t tests are used to infer about the reliability of a sample, i.e., whether it is drawn from a particular population
2 Pages(500 words)Case Study
Business statistic
Figure 1 shows the pictorial relationship between hours of operation and repair cost. It is shown in the scatter plot the relationship is almost positively perfect as reflected by the r value of .989 which according to Hurlburt , this
2 Pages(500 words)Case Study
In Clay Street lot of time is spent on upfront activities that are not directly related to the task as they tend to improve understanding across the culturally diverse members and
2 Pages(500 words)Case Study
Transformational leadership is the process that transforms or changes individuals by getting them improve on what to change, and to be led (Lussier & Christopher 42). This form of leadership involves assessment of the associate’s
2 Pages(500 words)Case Study
Analytical Tools
Fundamentals of the particular safety management are actually the reporting of investigation based date on the safety related events. Once the event is reported, an airline has the obligation to investigate the event and provide the
2 Pages(500 words)Case Study
Statistic homework
as opening weekend gross sales, the number of theaters a movie was shown in, and the number of weeks in which a movie stayed in the top 60 for gross sales are often used as indicators of the products financial success. With a sample of 100 motion pictures that were produced in
3 Pages(750 words)Case Study
Statistic homework
The company samples 90 online shoppers and collected data on day of the week for each transaction, time that the shoppers spent on the website, number of pages
3 Pages(750 words)Case Study
Let us find you another Case Study on topic Z / T Statistic Tools in Comparing Means for FREE!
Contact us:
Contact Us Now
FREE Mobile Apps:
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us