Question
Suppose that the average time spent per day with digital media several years ago was 3 hours and 19 minutes. For last?year, a random sample
Suppose that the average time spent per day with digital media several years ago was 3 hours and 19 minutes. For last?year, a random sample of 20 adults in a certain region spent the numbers of hours per day with digital media given in the accompanying table. Preliminary data analyses indicate that the?t-interval procedure can reasonably be applied. Find and interpret a 99?% confidence interval for last?year's mean time spent per day with digital media by adults of the region.?(Note: x=4.74 hr and s=2.23 ?hr.)
The 99?% confidence interval is from Hours -------?to Hours--------?
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