Question

A researcher is interested in understanding the variation in the price of store brand milk. A random sample of 36 grocery stores selected from a population and the mean price of store brand milk is $3.13. A similar study shows the population standard deviation is $0.23. Construct a 99% confidence interval to estimate the population mean. (Hint: use z-interval)

Select one:

a. (3.06, 3.20)

b. (2.90, 3.36)

c. (3.12, 3.14)

d. (3.07, 3.19)

e. (3.03, 3.23)

Answer 1