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In 2018, as a way of commemorating the 10-year anniversary of the release of the first...

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Statistics

In 2018, as a way of commemorating the 10-year anniversary ofthe release of the first smartphone, an undergraduate studentpolled a random sample of 26 her peers in hopes of estimating theaverage time (in hours) such students spend on their smartphoneeach day, on average. Using the data she collected, she produced a95% confidence interval for the true mean time college studentsspend on their phone each day: (5.035, 6.165)

1. What was the margin of error of this confidence interval?

2. What was the sample mean time (in hours) for the n = 26students?

3. What was the sample standard deviation (in hours) for the n =26 students? Submit your answer rounded to four decimals.

Show work please and thank you.

Answer & Explanation Solved by verified expert
3.9 Ratings (699 Votes)
1Formula for Confidence Interval for Population mean whenpopulation Standard deviation is not knownMargin of errorieConfidence Interval for Population    See Answer
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