A market researcher selects a simple random sample of n = 100 users of a social

Question

A market researcher selects a simple random sample of n = 100 users of a social media website from a population of over 100 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 O A. There is a 95% chance that a randomly selected registered user spends between 15 and 57 minutes on the site per day O B. Of the over 100 million registered users, 95% of them spend between 15 and 57 minutes on the site per day. OC. 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 OD. One is 95% confident that the true mean time all registered users spend on the site per day is between 15 and 57 minutes.

Explanation / Answer

The confidence interval states the confidence that the true parameter lie in the limits of the

confidence interval.

That is

One is 95% confident that the true mean time all registered users spend on the site per day is

between 15 and 57 minutes.

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