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: 1.4 ,5.0 ,5.8, 4.1, 5.6, 2.1, 6.5, 2.3, 8.0, 9.5, 7.3, 5.9, 9.4, 4.3, 2.9, 2.8, 5.1, 4.5, 4.1, 6.6 a. Obtain and interpret a 90% confidence interval for last year’s mean time spent per day with digital media by American adults. (Note: ? = 5.16 hr; s = 2.3 hr.)
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: 1.4 ,5.0 ,5.8, 4.1, 5.6, 2.1, 6.5, 2.3, 8.0, 9.5, 7.3, 5.9, 9.4, 4.3, 2.9, 2.8, 5.1, 4.5, 4.1, 6.6 a. Obtain and interpret a 90% confidence interval for last year’s mean time spent per day with digital media by American adults. (Note: ? = 5.16 hr; s = 2.3 hr.)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 21PPS
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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:
1.4 ,5.0 ,5.8, 4.1, 5.6, 2.1, 6.5, 2.3, 8.0, 9.5, 7.3, 5.9, 9.4, 4.3, 2.9, 2.8, 5.1, 4.5, 4.1, 6.6
a. Obtain and interpret a 90% confidence interval for last year’s mean time spent per day with digital media by American adults. (Note: ? = 5.16 hr; s = 2.3 hr.)
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