Suppose that the average time spent per day with digital media several years ago was 3 hours and 42 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 95​% confidence interval for last​ year's mean time spent per day with digital media by adults of the region.​ (Note: x=5.49 hr and s=2.20 ​hr.)

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        Suppose that the average time spent per day with digital media several years ago was
3
hours and
42
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
95​%
confidence interval for last​ year's mean time spent per day with digital media by adults of the region.​ (Note:
x=5.49
hr and
s=2.20
​hr.)
 
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