Question 6

Use the following information for Questions 6-9.

The time spent using Facebook per session is normally distributed with a mean of 4 minutes and a standard deviation of 2 minutes. Now, a random sample of 16 sessions is taken.

What proportion of the sample means would be more than 5 minutes? Answer with a decimal value that is rounded to THREE decimal places (0.XXX)

Flag question: Question 7

What proportion of the sample means would be between 2.5 and 4 minutes? Answer with a decimal value that is rounded to THREE decimal places (0.XXX)

Flag question: Question 8

Choose an answer that best describes the difference in the results in question 4 and question 6.

Group of answer choices

The differences in the means of sample means explain the differences in our results.

The differences in the population means explain the differences in our results.

The differences in the populations explain the differences in our results.

The differences in the standard deviations of sample means explain the differences in our results.

Flag question: Question 9

Find the probability for each of the following outcomes using the following information: the time spent using Facebook per session is normally distributed with a mean of 4 minutes and standard deviation of 2 min.

A) If a random sample of 10 sessions is taken, find the probability that the average session time is greater than 3.2 minutes. Answer with a decimal value that is rounded to THREE decimal places (0.XXX)

B)If a random sample of 25 session is taken, find the probability that the average session time is greater than 3.2 minutes. Answer with a decimal value that is rounded to THREE decimal places (0.XXX)