A marketing consultant is hired by a major restaurant chain wishing to investigate the preferences and spending patterns of lunch customers. The CEO of the chain hypothesized that the average customer spends at least $13.50 on lunch. A survey of 25 customers sampled at one of the restaurants found the average lunch bill per customer to be = $14.50. Based on previous surveys, the restaurant informs the marketing manager that the standard deviation is = $3.50. To address the CEO's conjecture, the marketing manager carried out a hypothesis test of H 0: = 13.50 vs. H a: > 13.50
A marketing consultant is hired by a major restaurant chain wishing to investigate the preferences and spending patterns of lunch customers. The CEO of the chain hypothesized that the average customer spends at least $13.50 on lunch. A survey of 25 customers sampled at one of the restaurants found the average lunch bill per customer to be = $14.50. Based on previous surveys, the restaurant informs the marketing manager that the standard deviation is = $3.50. To address the CEO's conjecture, the marketing manager carried out a hypothesis test of H 0: = 13.50 vs. H a: > 13.50
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 marketing consultant is hired by a major restaurant chain wishing to investigate the preferences and spending patterns of lunch customers. The CEO of the chain hypothesized that the average customer spends at least $13.50 on lunch. A survey of 25 customers sampled at one of the restaurants found the average lunch bill per customer to be = $14.50. Based on previous surveys, the restaurant informs the marketing manager that the standard deviation is = $3.50. To address the CEO's conjecture, the marketing manager carried out a hypothesis test of H 0: = 13.50 vs. H a: > 13.50 and obtained a P-value = 0.077. To illustrate his results, the director also wanted to calculate a 90% confidence interval with a margin of error m = $1.00. The required sample size equals:
| a. |
48.
|
|
| b. |
28.
|
|
| c. |
34.
|
|
| d. |
100
|
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