MathStatisticsInferential StatisticsHypothesis testing

Confidence Intervals for the Mean

Time spent on social media

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For the purpose of studying the average time spent on social media in a city, we took a sample of 30 individuals and asked them about the time they spent and found the average to be three hours if the sample standard deviation is equal to 1 hour. If sampling distribution is normally distributed based on the sample, what is the margin of error if $t$ is equal to 2.045?

Select one option from the list

0.373

0.55

3.15

1.96

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