Question

The length of time in yours took a random sample of 32 forkers to quit smoking permanentyrested in the population standard deviation is 630.00, is there enough evidence to the claim that the man time to smokers to gut smoking permanenty i 13 yos? Complete parts) 127 87 104 123 103 174 117 22.10 165 159 204 16.5 144 174 15.1 162 223 10.7 17.5 16.7 107 224 32 156 112184 11.1 1 197 2211553 (a) Identity the chain and state the posis and arrative hypothesis O A H HS 13 OD 13 (cam) OB Host H>13 OEM:13 OR H2 13 cm to let the standardized test technology 2. Round to two dentales as needed) c) Find the Pale Uselechogy P-(Round to three decimal places as needed.) decide whether to reject or fail to roject the null hypothesis and () interpret the decision in the context of the original claim at the level of significance O A Reject Hy. There is sufficient evidence to reject the claim that the meantime takes chers to quit smoking OB. Fail to reject H. There is not suficient evidence to reject the claim that the meantime it takes mors tout permanenty 13 years smoking permanently is 13 years OC. Fail to reject Hy. There is suficient evidence to reject the claim that the mean time tokes skers to out OD. Reject Ho. There is not suficient evidence lo reject reclaim that the mean time it takes smokers to quit smoking smoking permanently is 13 years permanently is 13 years

Answer 1

$Smokers: \\ a. \ Ans : C \\ b. \ z_{test}=\frac{\bar{x}-13}{\sigma/\sqrt{n}} , \ \bar{x}=15.5656, \\ z_{test} = 2.30 \\ c. \ p-value=P(Z\ge 2.3)*2 = 0.021 \\ d. \ Since,\ p-value < 0.09, \ we\ reject\ null. \\ so\ ans : \ \ A \\ \\ coeff.of\ determination = r^{2} = 0.638 \\ \%\ of\ variation\ explained\ by\ regression\ line = 63.8\% \\ Unexplained\ \%\ = 100-63.8 = 36.2\% \\ \\ Mean = np=12 \\ ans : A.$