The lengths of time (in years) it took a random sample of 32 former smokers to quit smoking permanently are listed. Assume the population standard deviation is 4.6 years. At a = 0.01, is there enough evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years? Complete parts (a) through (e). 9.7 7.9 10.7 21.4 13.8 15.9 14.7 21.1 20.9 14.9 18.9 7.8 20.3 16.7 19.3 21.6 20.4 8.9 8.6 8.7 20.2 21.8 21.5 13.3 7.6 20.8 19.4 19.8 16.1 19.1 8.5 15.1 (a) Identify the claim and state the null hypothesis and alternative hypothesis. OA. Ho: μz 14 (claim) Ha:μ< 14 OB. Ho: μ> 14 (claim) H₂:μ≤ 14 O D. Ho: μ# 14 (claim) H₂:μ=14 O E. Ho: μ≤14 (claim) Ha:μ> 14 O A. Fail to reject Ho. There is sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years. C. Reject Ho. There is not sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years. C. Ho: μ=14 (claim) Ha:μ#14 (b) Identify the standardized test statistic. Use technology. Z= (Round to two decimal places as needed.) (c) Find the P-value. Use technology. P= (Round to three decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis and (e) interpret the decision in the context of the original claim at the 1% level of significance. OB. OF. Ho: μ> 14 Ha: μ≤ 14 (claim) Reject Ho. There is sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years. D. Fail to reject Ho. There is not sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years.
The lengths of time (in years) it took a random sample of 32 former smokers to quit smoking permanently are listed. Assume the population standard deviation is 4.6 years. At a = 0.01, is there enough evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years? Complete parts (a) through (e). 9.7 7.9 10.7 21.4 13.8 15.9 14.7 21.1 20.9 14.9 18.9 7.8 20.3 16.7 19.3 21.6 20.4 8.9 8.6 8.7 20.2 21.8 21.5 13.3 7.6 20.8 19.4 19.8 16.1 19.1 8.5 15.1 (a) Identify the claim and state the null hypothesis and alternative hypothesis. OA. Ho: μz 14 (claim) Ha:μ< 14 OB. Ho: μ> 14 (claim) H₂:μ≤ 14 O D. Ho: μ# 14 (claim) H₂:μ=14 O E. Ho: μ≤14 (claim) Ha:μ> 14 O A. Fail to reject Ho. There is sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years. C. Reject Ho. There is not sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years. C. Ho: μ=14 (claim) Ha:μ#14 (b) Identify the standardized test statistic. Use technology. Z= (Round to two decimal places as needed.) (c) Find the P-value. Use technology. P= (Round to three decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis and (e) interpret the decision in the context of the original claim at the 1% level of significance. OB. OF. Ho: μ> 14 Ha: μ≤ 14 (claim) Reject Ho. There is sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years. D. Fail to reject Ho. There is not sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 14 years.
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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Statistics Question 25
Transcribed Image Text:The lengths of time (in years) it took a random sample of 32 former smokers to quit smoking permanently are listed.
Assume the population standard deviation is 4.6 years. At a = 0.01, is there enough evidence to reject the claim that the
mean time it takes smokers to quit smoking permanently is 14 years? Complete parts (a) through (e).
7.9 10.7 21.4 13.8 15.9 14.7 P
20.3 16.7
18.9 7.8
8.9 8.6
8.7 20.2
19.8
7.6 20.8 19.4
16.1
9.7
21.1
19.1
20.9 14.9
8.5 19.3 21.6 20.4
15.1
21.8 21.5 13.3
(a) Identify the claim and state the null hypothesis and alternative hypothesis.
OA. Ho: μ ≥ 14 (claim)
Ha:μ< 14
B. Ho: μ> 14 (claim)
Ha:μ≤14
O D. Ho: μ‡ 14 (claim)
H₂:μ = 14
O E. Ho: μ≤14 (claim)
Ha:μ> 14
(b) Identify the standardized test statistic. Use technology.
Z= (Round to two decimal places as needed.)
(c) Find the P-value. Use technology.
P= (Round to three decimal places as needed.)
O A. Fail to reject Ho. There is sufficient evidence to
reject the claim that the mean time it takes smokers
to quit smoking permanently is 14 years.
OC. Ho: μ=14 (claim)
Ha:μ#14
OC. Reject Ho. There is not sufficient evidence to reject
the claim that the mean time it takes smokers to quit
smoking permanently is 14 years.
OF. Ho: μ> 14
(d) Decide whether to reject or fail to reject the null hypothesis and (e) interpret the decision in the context of the original
claim at the 1% level of significance.
Ha: μ≤ 14 (claim)
B. Reject Ho. There is sufficient evidence to reject the
claim that the mean time it takes smokers to quit
smoking permanently is 14 years.
O D. Fail to reject Ho. There is not sufficient evidence to
reject the claim that the mean time it takes smokers
to quit smoking permanently is 14 years.
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