Consider a study that compares the Atkins diet to a conventional
diet. A study at the University of Pennsylvania selected a sample
of 63 subjects from the local population of obese adults.
Researchers randomly assigned 33 to the Atkins diet and 30 subjects
to a conventional diet. Test whether there is a significant
difference in the mean weight loss (measured in pounds) across the
two different diet programs.
Using software:
Generate summary statistics (central tendency and variability
measures) for the two samples and briefly summarize what they
say.
b. Conduct a test of significance for the difference between the
mean sales across the two different locations in the store. Be sure
to show the output from the software and interpret the results.
c. Construct a 95% confidence interval for the difference
parameter in mean sales and make an interpretation.
d. Finally, are there any other factors, besides where the
product is placed, that could possibly influence sales (identify at
least 2)? Include a brief explanation of each.
Atkins Conventional
27 26
31 26
34 29
31 24
28 25
32 22
33 27
27 24
34 25
25 28
31 30
26 27
28 25
30 23
26 20
26 22
31 29
34 28
27 21
28 25
33 22
26 24
26 22
30 25
26 29
34 24
25 26
32 21
29 22
33 21
27
29
25