Mathematics, 29.06.2019 00:20 jksike223
In a sample of 8 high school students, they spent an average of 28.8 hours each week doing sports with a sample standard deviation of 3.2 hours. find the 95% confidence interval, assuming the times are normally distributed.
Answers: 2
is unknown, and the sample standard deviation 
, must replace it, the 
distribution must be used for the confidence interval.
, 
.
(significance level) is 5%.
. (Read from the t-distribution table see attachment)
.
hours.
hours.
.
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In a sample of 8 high school students, they spent an average of 28.8 hours each week doing sports wi...
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