To test the hypothesis that the population standard deviation sigma=13.2, a sample size n=11 yields a sample standard deviation 7.480. Calculate the P-value andchoose the correct conclusion.Your answer:The P-value 0.162 is not significant and so does not strongly suggest that sigma<13.2.The P-value 0.162 is significant and so strongly suggests that sigma<13.2.The P-value 0.014 is not significant and so does not strongly suggest that sigma<13.2.The P-value 0.014 is significant and so strongly suggests that sigma<13.2.The P-value 0.024 is not significant and so does not strongly suggest that sigma<13.2.The P-value 0.024 is significant and so strongly suggests that sigma<13.2.The P-value 0.008 is not significant and so does not strongly suggest that sigma<13.2.The P-value 0.008 is significant and so strongly suggests that sigma<13.2.The P-value 0.295 is not significant and so does not strongly suggest that sigma<13.2.The P-value 0.295 is significant and so strongly suggests that sigma<13.2.

Given data : sample size, n = 11 population standard deviation,σ= 13.2 sample…

Answered: Your answer: O The P-value 0.162 is not…

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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7.7 Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many grade-point averages must be obtained so that the sample mean is within 0.012 of the population mean? Assume that a 98% confidence level is desired. If using the range rule of thumb, σ can be estimated as range4=6−0/4=1.5. Does the sample size seem practical? The required sample size is? (round to the nearest whole number)
| 8.2.81 Question Help In a study, the mean number of days that 124 adolescents in substance abuse treatment used medical marijuana in the last 5 months was 119.17. Assuming the population standard deviation is 34 days, a 95% confidence interval for the mean number of days, µ, of medical marijuana use in the last 5 months of all adolescents in substance abuse treatment is from 113.19 days to 125.15 days; this interval's margin of error is 5.98 days. Complete parts (a) through (d) below. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. a. The mean number of days that 31 adolescents in substance abuse treatment used medical marijuana in the last 5 months was 115.54. Find a 95% confidence interval for based on that data. The 95% confidence interval is from day(s) to day(s). (Round to two decimal places as needed.)
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Based on information from the Federal Highway Administration web site, the average annual miles driven per vehicle in the United States is 13.5 thousand miles. Assume σ ≈ 500 miles. Suppose that a random sample of 21 vehicles owned by residents of Chicago showed that the average mileage driven last year was 13.2 thousand miles. Would this indicate that the average miles driven per vehicle in Chicago is different from (higher or lower than) the national average? Use a 0.05 level of significance. What are we testing in this problem? (a) What is the level of significance? (b) What sampling distribution will you use? What assumptions are you making? What is the value of the sample test statistic? (c) Find (or estimate) the P-value. (d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis? Are the data statistically significant at level ?? (e) Interpret your conclusion in the context of the application.

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