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Holt Mcdougal Larson Pre-algebra: Student Edition 2012

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.5: Interpreting Data

Problem 1C

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A study was performed to compare two treatment regimens for smokers who wish to stop smoking. The two treatments are:
Treatment A: Use Nicorette chewing gum, which is a nicotine replacement.
Treatment B: Switch to e-cigarettes.
A total of 500 smokers were randomly allocated to one of the two treatments. The outcome after 12 weeks is summarised in the following contingency
table.
Stop Smoking
Smoke
Treatment
Yes
No
Total
less
A
76
16
108
200
В
78
54
168
300
Total
154
70
276
500
Given:
The value of the test statistic is x?
= 14.269.
Use a = 0.05 as the level of significance.

For Treatment A calculate the expected frequencies by completing the following table:
Stop Smoking
Smoke
Treatment
Yes
No
less
A
Round your answers to 4 decimal places.

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