A lawyer researched the average number of years served by 45 different justices on the Supreme Court. The average number of years served was 13.8 years with a standard deviation of 7.3 years. What is the 95% confidence interval for the average number of years served by all Supreme Court justices?   Question 6 options:   1)  (11.7,15.9)   2)  (11.8,15.8)   3)  (12.9,16.9)   4)  (12.5,17.3)

The daily salaries of security guards for 10 security agencies are as follows: 350, ₱400, 375, 420, 500,470, 380, 450, 520, and 460. What is the point estimate for themean? Find the 95% confidence interval of the mean for the salaries of securityguards in the area.

A sample of people attending a professional football game averages 13.7 years of formal education. The surrounding community is estimated to have a mean education of 12.1 years. Which test should be used to see if this sample of game attendees is different from the larger population of residents?

If a teacher wants to assess whether there is a relationship between males and females on test performance, the most appropriate statistical test would be

According to a dietary study. high sodium in take may be related to ucers. stomach cancer. and migraine headaches. The human requirement for salt is only 220 milligrams per day. which is surpassed in most single servings of ready-to-eat cereals. If a random sample of 20 similar servings of a certain cereal has a mean sodium content of 244 milligrams and a standard devlation of 24.5 miligrams, does this suggest at 0.05 level of significance that the average sodlum content for a single serving of such cereal is greater than 220 milligrams? The p-value of the test statistic in 6 decimal places and the critical value in two decimal places is: example answer: 0.123456 and 1.23

Twenty-four fast-food restaurant hourly employees were surveyed to see how many hours they worked per week, on average. The following data was obtained: 34, 45, 43, 41, 49, 48, 29, 36, 50, 40, 40, 49, 36, 54, 31, 41, 42, 37, 47, 29, 47, 36, 47, 48 Assuming the population standard deviation is a = 6, construct a 87% confidence interval for the mean number of hours per week that the population of fast-food restaurant employees work. I = a 2 NINA || Margin of Error: E = We are 87% confident that fast-food restaurant hourly employees, on average, work between hours and hours per week.

If n= 220, p-hat= .4, then what will be the 87.4% confidence interval for the population proportion?

1)higher or lower 2)slower or faster

In a time-use study, twenty randomly selected managers spend a mean of 2.4 hours each day on paperwork. The standard deviation of the twenty scores is 1.3 hours. Construct the 95% confidence interval for the mean paperwork time of all managers.