past, a business noted its mean sales order size was $100. This business is int g whether a recent advertising campaign has increased its mean sales order siz e of 40 orders produced a sample mean of $105. Assume the standard deviat $15 and sales order size is normally distributed. What is the test statistic? 19 58 36 11 05 ♫M A W
past, a business noted its mean sales order size was $100. This business is int g whether a recent advertising campaign has increased its mean sales order siz e of 40 orders produced a sample mean of $105. Assume the standard deviat $15 and sales order size is normally distributed. What is the test statistic? 19 58 36 11 05 ♫M A W
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.CR: Chapter 13 Review
Problem 10CR
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Transcribed Image Text:In the past, a business noted its mean sales order size was $100. This business is interested in
testing whether a recent advertising campaign has increased its mean sales order size. A random
sample of 40 orders produced a sample mean of $105. Assume the standard deviation is known
to be $15 and sales order size is normally distributed. What is the test statistic?
1.49
2.58
2.36
2.11
O 1.05
O
R
MẢ
W
30
P
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