According to eMarketer, the average time spent per day with digital media in 2010 was 3 hours and 14 minutes. For last year, a random sample of 20 American adults spent the following number of hours per day with digital media.

Find and interpret a 90% confidence interval for last year's mean time spent per day with digital media by American adults. (xÌ… = 5.16 hr and s = 2.30 hr.)

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