More shoppers do the majority of their grocery shopping on S

More shoppers do the majority of their grocery shopping on Saturday thanb any other day of the week. However, is the a difference in the various age groups in the proportion of people who do the majority of their grocery shopping on Saturday? A study showed the results for the different age- groups. ( Data extracted from \"Major shopping by Day,\" Progressive Grocer Annual Report, April 30, 2002) The data were reported as percentages, and no sample sizes were given:

Under 35 35-54 over 54

Saturday 24% 28% 12%

A day other than

Saturday 74% 72% 88%

Assume that 200 shoppers for each age category were surveyed.

a. Is there evidence of a significant difference among the age groups with respect to major grocery shopping day?(use alpha=0.05)

b. Determine the p-value in (a) and interpret its meaning

c. Discuss the managerial implications of (a) and (b). How can grocery stores use this imformation to improve marketing and sales? Be specific.

Solution