Suppose that the average time spent per day with digital media several years ago was 3 hours and 21 minutes. For lastyear, 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 thet-interval procedure can reasonably be applied. Find and interpret a 95% confidence interval for lastyear's mean time spent per day with digital media by adults of the region.(Note: x=4.38 hr and s=2.29 hr.)

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The 95% confidence interval is from

nothing

hour(s) to

nothing

hour(s).

(Round to two decimal places asneeded.)

Interpret the 95% confidence interval. Select all that apply.

A.

With 95% confidence, the mean amount of time spent per day on digital media last year by all adults in the region is between theinterval's bounds.

B.

There is a 95% chance that the mean amount of time spent per day on digital media last year by all adults in the region is between theinterval's bounds.

C.

95% of all possible random samples of 20 adults in the region have mean amounts of time spent per day on digital media last year that are between theinterval's bounds.

D.

95% of all adults in the region spent amounts of time per day on digital media last year that are between theinterval's bounds.