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A random sample of 51 orders for take-out food at a local pizzeria found that the average cost of an order was $29 with a standard deviation s = $14. (i). Find the 95% confidence interval for the average cost of all orders. Show your work. (ii). Based on the confidence interval in part (i), can we conclude that the average cost of all orders is above $25? Explain.

A random sample of 51 orders for take-out food at a local pizzeria found that the average cost of an order was $29 with a standard deviation s = $14. (i). Find the 95% confidence interval for the average cost of all orders. Show your work. (ii). Based on the confidence interval in part (i), can we conclude that the average cost of all orders is above $25? Explain.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A random sample of 51 orders for take-out food at a local pizzeria found that the average cost of an order was $29 with a standard deviation s = $14. (i). Find the 95% confidence interval for the average cost of all orders. Show your work. (ii). Based on the confidence interval in part (i), can we conclude that the average cost of all orders is above $25? Explain.
Transcribed Image Text:A random sample of 51 orders for take-out food at a local pizzeria found that the average cost of an order was $29 with a standard deviation s = $14. (i). Find the 95% confidence interval for the average cost of all orders. Show your work. (ii). Based on the confidence interval in part (i), can we conclude that the average cost of all orders is above $25? Explain.
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