Question
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
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 5.85 years. At =0.02, 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).
18.2 | 14.7 | 14.4 | 17.9 | 11.8 | 13.4 | 7.1 | 12.4 | |
19.3 | 14.9 | 16.2 | 22.8 | 11.7 | 22.5 | 18.3 | 14.7 | |
22.5 | 18.2 | 17.6 | 21.7 | 22.2 | 10.3 | 14.8 | 21.5 | |
9.5 | 20.5 | 11.9 | 15.1 | 16.2 | 9.1 | 14.2 | 11.8 |
(a) Identify the claim and state the null hypothesis and alternative hypothesis. A) H0: =14(claim) Ha: 14
B) H0: >14 (claim) Ha: 14
b) Identify the standardized test statistic. Use technology.
Z = _
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