A market researcher selects a simple random sample of n 100

A market researcher selects a simple random sample of n= 100 users of a social media website from a population of over 103 million registered users. After analyzing the sample, she states that she has 95% confidence that the mean time spent on the site per day is between 15 and 57 minutes. Explain the meaning of this statement. Choose the correct answer below. There is a 55% chance that a andomly selected registered user spends between 15 and 57 minutes on the site per day. Of the over 103 million registered users. 95% of them spend between 15 and 57 minutes on the site per day. One is 95% confident that the true mean time all registered users spend on the site per day is between 15 and 57 minutes. During any given day there is a 95% chance that the mean time all registered users spent on the site was between 15 and 57 minutes.

Solution

ANSWER IS B

OVER THE 100 MILLION REGISTERED USERS, 95% OF THEM SPEND BETWEEN 15 AND 57 MINUTES ON THE SITE PER DAY

THE INTERVAL OF CONFIDENCE SAY THAT 95% OF THE POPULATION IS IN THE INTERVAL