Michael Sullivan, the author of this text, determined the mean amount of weekly screen time spent on
Question:
Michael Sullivan, the author of this text, determined the mean amount of weekly screen time spent on his phone was 81.3 minutes. A 95% confidence interval for the mean amount of time spent on his phone weekly has a lower bound of 72.9 minutes.
(a) What is the margin of error for the confidence interval?
(b) What is the upper bound for the confidence interval?
(c) Interpret the confidence interval.
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