Independent-dependent samples and variables

Assignment Help Basic Statistics

Reference no: EM13111066

1. Explain the difference between independent samples and dependent samples. Classify the following as independent or dependent samples:

a. Weights of identical twins

b. The effectiveness of two different brands of ibuprofen

c. Effect of a new training program on time taken to complete a task, measured by a "before" and "after" test

d. Test scores of a group of students on a math test and a biology test.

2. Complete the following:

a. Select a variable. Compare the mean of the variable for a sample of 30 for one group with the mean of the variable for a sample of 30 for a second group. Use a z test.

b. Select a variable. Compare the mean of the variable for a sample of 10 for one group with the mean of the variable for a sample of 10 for a second group. Use a t test.

c. Select a variable that will enable you to compare proportions of two groups. Use sample sizes of at least 30. Use the z test for proportions.

Reference no: EM13111066

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