Question

According to Nielsen//NetRatings, the average visitor to the American Greetings Website spends 11.85 minutes at the site. Assuming this finding to be based on a random sample of 20 visitors to the site, a POPULATION standard deviation of 3.0 minutes, and a population of visiting times that is approximately normally distributed, a 90% confidence interval for the population mean is closest to 10.8840 to 12.8160 10.7465 to 12.9535 10.5352 to 13.1648 10.2870 to 13.4130 10.1226 to 13.5774

          According to Nielsen//NetRatings, the average visitor to the American Greetings Website spends 11.85 minutes at the site. Assuming this finding to be based on a random sample of 20 visitors to the site, a POPULATION standard deviation of 3.0 minutes, and a population of visiting times that is approximately normally distributed, a 90% confidence interval for the population mean is closest to
10.8840 to 12.8160
10.7465 to 12.9535
10.5352 to 13.1648
10.2870 to 13.4130
10.1226 to 13.5774

Show more…

According to Nielsen//NetRatings, the average visitor to the American Greetings Website spends 11.85 minutes at the site. Assuming this finding to be based on a random sample of 20 visitors to the site, a POPULATION standard deviation of 3.0 minutes, and a population of visiting times that is approximately normally distributed, a 90% confidence interval for the population mean is closest to
10.8840 to 12.8160
10.7465 to 12.9535
10.5352 to 13.1648
10.2870 to 13.4130
10.1226 to 13.5774

Added by Mario S.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Ivan Kochetkov

11/18/2023

Step 1

We are given the sample mean (x̄) = 11.85 minutes, sample size (n) = 20, population standard deviation (σ) = 3.0 minutes, and confidence level = 90%. Show more…

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According to Nielsen/NetRatings, the average visitor to the American Greetings Website spends 11.85 minutes at the site. Assuming this finding to be based on a random sample of 20 visitors to the site, a population standard deviation of 3.0 minutes, and a population of visiting times that is approximately normally distributed, the 90% confidence interval for the population mean is closest to

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