un a random sample of 26 people, the mean commute time to work was 32.6 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 µ. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is (Round to one decimal place as needed.y The margin of error of u is. (Round to one decimal place as needed.) Interpret the results. O A. With 90% confidence, it can be said that the commute time is between the bounds of the confidence interval. O B. If a large sample of people are taken approximately 90% of them will have commute times between the bounds of the confidence interval. OC. It can be said that 90% of people have a commute time between the bounds of the confidence interval. O D. With 90% confidence, it can Be said that the population mean commute time is between the bounds of the confidence interval.

Only part d

A survey found that women's heights are normally distributed with mean 62.1  inches  and standard deviation 3.4 inches  The survey also found that men's heights are normally distributed with mean 69.7 inches  and standard deviation 3.6 inches  Most of the live characters employed at an amusement park have height requirements of a minimum of 56 inches  and a maximum of 62 inches 1. The percentage of men who meet the height requirement is _____   Circle which one is correct 2. Since most men (meet/do not meet) the height requirement, it is likely that most of the characters are (women/men)    3. The new height requirements are a minimum of______ inches and and maximum of _______inches

A researcher wanted to estimate the total number of hours students spent watching Zoom lectures each week for their courses.  A sample of 48 students was surveyed and the sample spent a mean time of 22.1 hours watching Zoom lectures in a week, with a sample standard deviation of 4.7 hours.   Construct a 95% confidence interval for the population mean number of hours students spent watching Zoom lectures. Round your final answers to one decimal place.       ______________     hours ≤ μ ≤   ______________   hours

Use technology to construct the confidence intervals for the population variance 6² and the population standard deviation o. Assume the sample is taken from a normally distributed population. c = 0.90, s = 37, n = 18 35 The confidence interval for the population variance is (Round to two decimal places as needed.) The confidence interval for the population standard deviation is (.) (Round to two decimal places as needed.)

Steels rods are manufactured with a mean length of 25 cm. Because of the variability in the manufacturing​ process, the lengths of the rods are approximately normally distributed with a standard deviation of 0.08 cm. Complete question D.   D. If an order comes in for 10,000 steel rods, how many rods should the plant manager expect to manufacture if the order states that all rods must be between 24.9  cm and 25.1 cm??

K In a random sample of eleven people, the mean driving distance to work was 18.2 miles and the standard deviation was 4.1 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. Identify the margin of error. 2.8 miles (Round to one decimal place as needed.) Construct a 95% confidence interval for the population mean. (15.4,21.0) (Round to one decimal place as needed.) ... Interpret the results. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) OA. It can be said that % of the population has a driving distance to work (in miles) that is between the interval's endpoints. OB. With % confidence, it can be said that most driving distances to work (in miles) in the population are between the interval's endpoints. O C. % of all random samples of eleven people from the…

A test has a mean score of 55 with a standard deviation of 12. Using the Empirical Rule determine the range of the scores for the:   A. Middle 68% of the population.   B.Middle 95% iof the population. Explain.

A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 41 students who averaged 41.2 minutes concentrating on their professor during the hour lecture. The standard deviation was 12.3 minutes. Round answers to 3 decimal places where possible. With 95% confidence the population mean minutes of concentration is between _______ and __________  minutes.  If many groups of 41 randomly selected members are studied, then a different confidence interval would be produced from each group. About _________ percent of these confidence intervals will contain the true population mean minutes of concentration and about _________ percent will not contain the true population mean minutes of concentration.

You want to find a 90% confidence interval for the mean height of students at your school. You somehow know that the standard deviation of student heights is 3.9. You want your margin of error to be no more than 0.3 inches. What is the minimum number of students whom you would need to measure? Submit Question