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John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals. He calculated t = 1.9 from his data. He had a directional hypothesis (i.e., self-esteem would be higher after attending the program). Write up the summary of his results and his conclusion regarding his hypothesis. Mark replicated John s experiment in every way except he used 100 women in his study. He also calculated t = 1.9 from his data. He also had the same directional hypothesis. Write up the summary of his results and his conclusion regarding his hypothesis. What observations would you make from the findings of these two studies?
The time to complete a construction project is onrmally dsitributed with a mean of 60 weeks and a standar deviation of 4 weeks. What is the probability the project will be finished in 62 weeks or less?
Assume that you want to use a 0.05 significance level to test the claim that paired sample data come from a population for which the mean difference is Ud = 0. Find (a) d-, (b) Sd, (c) the t test statistic, and the critical values.
What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments? Round your answer to decimal places.
Say, for example, the correlation is 0.75 between Height (measured in inches) and Weight (measured in pounds). If Height were changed to being measured in centimeters (where 1 inch = 2.54 centimeters) what effect would this have on the correlation..
step 1 solve the following problems.use a program such as ms word to write your solutions to the following problems. be
The distribution of test scores is mui=35 and a standard deviation of 15. Do students taking the supplement have significantly better memory scores? Use a one-tailed t-test with an alpha=0.05.
Generate three random observations from the uniform distribution between -10 and 40 by using the following random numbers:
23% of college students say that they use credit cards because of the rewards program. you randomly select 10 students who say that they use the credit card because of its rewards program.
The value of "Z" chosen for constructing (calculating) the confidence interval estimate is determined by
A company that has 200 employees chooses a committee of 15 to represent . When the committee is formed, none of the 56 minority employees are selected. if the committee is chosen randomly. What is the probability that it contains no minorities.
Looking for 1-2 paragraphs per question with explanations and an example to help illustrate them. I get the basic idea of each question, but I would like something more illustrative to nail down the topics
Chi-square test for independence of attributes - Describe why a x 2 test of the resulting contingency table is appropriate for such an investigation.
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