In a random sample of 8 people the mean commute time to work
Last updated: 3/1/2024
In a random sample of 8 people the mean commute time to work was 35 5 minutes and the standard deviation was 7 3 minutes A 98 confidence interval using the t distribution was calculated to be 27 8 43 2 After researching commute times to work it was found that the population standard deviation is 8 7 minutes Find the margin of error and construct a 98 confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known Compare the results The margin of error of u is Round to two decimal places as needed A 98 confidence interval using the standard normal distribution is Round to one decimal place as needed Compare the results Choose the correct answer below OA The confidence interval found using the standard normal distribution is wider than the confidence interval found using the student s t distribution OB The confidence interval found using the standard normal distribution has smaller lower and upper confidence interval limits OC The confidence interval found using the standard normal distribution is narrower than the confidence interval found using the student s t distribution OD The confidence interval found using the standard normal distribution is the same as the confidence interval found using the student s t distribution