A restaurant chain has 60 restaurants in Sidney, 50 in New York, and 45 in Kentucky. Management is considering adding a new item to the menus. To test the likely demand for this item, it was introduced on the menus of random samples of 12 restaurants in Sidney, 10 in New York and 9 in Kentucky. Using the subscripts 1,2 and 3 to denote Sidney, New York, and Kentucky, respectively, the sample means and standard deviations for number of orders received for this item per restaurant in the three cities in a week were as follows in the table bellow. Calculate an approximate 95% confidence interval for the mean number of orders of the new item for the restaurant chain received in a week.
A restaurant chain has 60 restaurants in Sidney, 50 in New York, and 45 in Kentucky. Management is considering adding a new item to the menus. To test the likely demand for this item, it was introduced on the menus of random samples of 12 restaurants in Sidney, 10 in New York and 9 in Kentucky. Using the subscripts 1,2 and 3 to denote Sidney, New York, and Kentucky, respectively, the sample means and standard deviations for number of orders received for this item per restaurant in the three cities in a week were as follows in the table bellow. Calculate an approximate 95% confidence interval for the mean number of orders of the new item for the restaurant chain received in a week.
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 restaurant chain has 60 restaurants in Sidney, 50 in New York, and 45 in
Kentucky. Management is considering adding a new item to the menus. To test the likely
demand for this item, it was introduced on the menus of random samples of 12 restaurants in
Sidney, 10 in New York and 9 in Kentucky. Using the subscripts 1,2 and 3 to denote
Sidney, New York, and Kentucky, respectively, the sample means and standard deviations
for number of orders received for this item per restaurant in the three cities in a week were as
follows in the table bellow.
Calculate an approximate 95% confidence interval for the mean number of orders of the new
item for the restaurant chain received in a week.
Transcribed Image Text:x₁=21.2
X2=13.3
x 3=26.1
S₁ 12.8
$₂=11.4
$3=9.2
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