and s=10.4. Then, the resulting 95% confidence interval for population mean is: O a. 36.48 < μ< 43.52 O b. 37.07 <μ< 42.93 O c. 37.73 <μ< 42.27 O d. 35.28 << 44.72

In a random sample of 27 people, the mean commute time to work was 31.3 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 90% confidence interval for the population mean u. What is the margin of error of µ? Interpret the results. The confidence interval for the population mean is (OD. (Round to one decimal place as needed.) The margin of error of u is (Round to one decimal place as needed.) Interpret the results. O A. It can be said that 90% of people have a commute time between the bounds of the confidence interval. B. With 90% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval. C. With 90% confidence, it can be said that the commute time is between the bounds of the confidence interval. D. If a large sample of people are taken approximately 90% of them will have commute times between the bounds of the confidence interval.

Assume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for a sample of size 63 with a mean of 49.8 and a standard deviation of 5.5. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places.

A sample data set, n = 115, shows human body temperatures with a mean of 99.6ºF. If the standard deviation σ is known to be 0.75ºF. Find the 99% confidence interval for μ.

In a random sample of 24 people, the mean commute time to work was 34.7 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 99% confidence interval for the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean µ is ( D (Round to one decimal place as needed.) The margin of error of u is. (Round to one decimal place as needed.) Interpret the results. O A. With 99% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval. O B. It can be said that 99% of people have a commute time between the bounds of the confidence interval. OC. With 99% confidence, it can be said that the commute time is between the bounds of the confidence interval. O D. If a large sample of people are taken approximately 99% of them will have commute times between the bounds of the confidence interval.

In a random sample of 25 ​people, the mean commute time to work was 31.8 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a​ t-distribution to construct a 95​% confidence interval for the population mean μ. What is the margin of error of μ​? Interpret the results.   The confidence interval for the population mean μ is??

In a sample of seven cars, each car was tested for nitrogen oxide emissions (in grams per mile). The results appear below. Assuming that nitrogen oxide emissions are normally distributed, 4. Car 1 2 3 4 5 6 7 Nitrogen oxide emission (g/mi) 0.13 0.18 0.15 0.09 0.12 0.18 0.08 a. Construct a 95% confidence interval for the mean amount of nitrogen oxide emissions for all cars. b. What effect would increasing the level of confidence have on the length of the interval?

A laboratory tested 82 chicken eggs and found that the mean amount of cholesterol was 228 milligrams with o = 19.0 milligrams. Construct a 95% confidence interval for the true mean cholesterol content, u, of all such eggs. O A. 223.89 mg < u< 232.11 mg O B. 224.55 mg < u< 231.45 mg OC. 224.55 mg<µ< 232.11 mg O D. 223.89 mg <µ< 231.45 mg

In a random sample of 27 ​people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a​ t-distribution to construct a 98​% confidence interval for the population mean μ. What is the margin of error of μ​? Interpret the results.       The confidence interval for the population mean μ is ,. ​(Round to one decimal place as​ needed.) The margin of error of μ is nothing. ​(Round to one decimal place as​ needed.) Interpret the results.     A. With 98​% ​confidence, it can be said that the commute time is between the bounds of the confidence interval.   B. If a large sample of people are taken approximately 98​% of them will have commute times between the bounds of the confidence interval.   C. With 98​% ​confidence, it can be said that the population mean commute time is between the bounds of the confidence interval.   D. It can be said that 98​% of people have a commute…