Question

How do smartphone owners use their smartphones when shopping in a grocery store? A sample of 731 smartphone owners in the United States revealed that 358 use their smartphone to access digital coupons, 355 look up recipes, 234 read reviews of products and brands, and 154 locate in-store items.

a.) For each smartphone user grocery shopping online activity, construct a 95% confidence interval estimate of the population proportion.

b.) What conclusions can you reach concerning how smartphone owners use their smartphones when shopping in a grocery store?

Answer 1

for digital coupons access:

95% confidence interval for digital coupons access =(0.453 , 0.526)

similarly

95% confidence interval for recipes access =(0.449 , 0.522)

95% confidence interval for reviews of products and brands =(0.286 , 0.354)

95% confidence interval for locate in-store items =(0.181 , 0.240)

b)

we can see that most users are interested in surfiing for digital coupons and recipes rather looking for the commodity to purchase.