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 6.7 years. At a = 0.01, is there enough evidence to reject the claim that t time it takes smokers to quit smoking permanently is 13 years? Complete parts (a) through (e). 9.1 17.1 14.2 11.9 8.7 19.3 21.7 21.8 13.4 16.1 20.5 9.2 20.2 9.5 19.6 18.3 12.3 16.9 9.6 9.4 16.1 14.3 7.6 21.6 18.5 15.7 10.5 16.9 14.5 21.5 10.2 10.6 A. Ho: ≤13 (claim) B. Ho: > 13 OC. Ho: >13 (claim) H₂:μ> 13 H₂:μ≤ 13 (claim) Hg: us 13 OD. Ho: 13 (claim) H₂:μ=13 O E. Ho: μ213 (claim) H₂H<13 ⒸF. Ho: μ=13 (claim) H₂: μ#13 (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. OA. 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 13 years. OB. Reject Ho. There is not sufficient evidence to reject the claim that the mean time it takes smokers to qu permanently is 13 years. OC. Fail to reject Ho. There is sufficient evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 13 years. O D. Reject Ho. There is sufficient evidence to reject the claim that the mean time it takes smokers to quit s permanently is 13 years.

Consider the following data: x 4 5 6 7 8 P(X = x) 0.2 0.2 0.1 0.2 0.3 Step 3 of 5: Find the standard deviation. Round your answer to one decimal place. Copy Data

Scores on the Wechsler Adult Intelligence Scale for the 2020 to 3434 age group are approximately Normally distributed with a mean of 110 and a standard deviation of 15. How high must a person score to be in the top 5%5% of all scores? Enter your answer as a whole number.

Suppose that the time required to complete a 1040R tax form is normal distributed with a mean of 100 minutes and a standard deviation of 10 minutes. What proportion of 1040R tax forms will be completed in at least 99 minutes? Round your answer to at least four decimal places. 0 X Ś

Calcium levels in people are normally distributed with a mean of 9.7 mgdL and a standard deviation of 0.5 mgdL . Individuals with calcium levels in the bottom 10% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.

A population has a mean of  1398.25 and standard deviation of 246.85   14 The middle interval that captures 95% of the means from samples of size 68 is, a 1351.04 1445.46 b 1348.03 1448.47 c 1344.82 1451.68 d 1341.41 1455.09

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.8 years, and standard deviation of 2.8 years. The 7% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place. Question Help: Video Submit Question

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.4 years, and standard deviation of 2.7 years. The 7% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place. years