Question

Choose a variable that will allow the use of dependent samples. For example, you might wish to see if a persons’ proficiency at softball has changed/improved after a training camp. Do not use variables that are presented in the course in order to illustrate the concept. Select a sample of data (10 to 20) value pairs (e.g. before and after), and then complete the following:

a. Write a brief statement of the purpose of the study.

b. Define the populations (the population before and after).

c. State the hypothesis for the study.

d. Select a level of significance.

e. State how the sample was selected.

f. Show the raw data in a table.

g. Decide which statistical test is appropriate and compute the test statistic

(z or t). Why is the test appropriate?

h. Find the critical value(s).

i. Show the computations of the sample statistic, the standard deviation of the

   differences in pairs, the test statistic.

j. State the decision. A training camp has changed/improved a person’s proficiency.

   at softball, or has not changed/improved a person’s proficiency.

   at softball.

k. Summarize the results.

l. Construct a confidence interval. State the conclusion. Summarize the results.

Answer 1