any impact on people's behavior. Before the new tax, convenience stores in the city sold an average of µ = 410, sugar filled beverages per day with o = 60. The distribution was normal. Following the new tax, data were collected for a sample of n = 9 days and the new mean was M = 386 from the same convenience stores. What is the standard error (oM) for the above scenario? а. 60 b. 30 с. 20 d. Cannot determine What is the z-score for the above scenario? a. -1.20 b. +1.20 C. -.80 d. .80
any impact on people's behavior. Before the new tax, convenience stores in the city sold an average of µ = 410, sugar filled beverages per day with o = 60. The distribution was normal. Following the new tax, data were collected for a sample of n = 9 days and the new mean was M = 386 from the same convenience stores. What is the standard error (oM) for the above scenario? а. 60 b. 30 с. 20 d. Cannot determine What is the z-score for the above scenario? a. -1.20 b. +1.20 C. -.80 d. .80
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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Transcribed Image Text:A public health researcher wants to know whether a new tax that was placed on soda has had
any impact on people's behavior. Before the new tax, convenience stores in the city sold an
average of µ = 410, sugar filled beverages per day with o = 60. The distribution was normal.
Following the new tax, data were collected for a sample of n = 9 days and the new mean was M
= 386 from the same convenience stores.
What is the standard error (oM) for the above scenario?
a. 60
b. 30
C. 20
d. Cannot determine
What is the z-score for the above scenario?
a. -1.20
b. +1.20
C. -.80
d. .80
Using a two-tailed test with a .05 significance level, can you conclude there was a
significant change in people's behavior?
a. Yes
b. No
C. Cannot determine
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