A random sample of 12-ounce milkshakes from 14 fast-food restaurants had the following number of calories. Assume
Question:
A random sample of 12-ounce milkshakes from 14 fast-food restaurants had the following number of calories.
Assume the population standard deviation is σ = 90.
a. Explain why it is necessary to check whether the population is approximately normal before constructing a confidence interval.
b. Following is a dotplot of these data. Is it reasonable to assume that the population is approximately normal?
c. If appropriate, construct a 95% confidence interval for the mean number of calories for all 12-ounce milkshakes sold at fast-food restaurants. If not appropriate, explain why not.
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answered By
Vincent Omondi
I am an extremely self-motivated person who firmly believes in his abilities. With high sensitivity to task and operating parameters, deadlines and keen on instructions, I deliver the best quality work for my clients. I handle tasks ranging from assignments to projects.
109+ Reviews
314+ Question Solved
Related Book For 
Question Posted:
