The following data show the number of hours per day 12 adults spent in front of
ID: 3246764 • Letter: T
Question
The following data show the number of hours per day 12 adults spent in front of screens watching television-related content. Complete parts a and b below 1.3 5.1 4.2 5.4 7.8 7.4 5.9 2.3 5.7 1.5 2.4 8.9 a. Construct a 99% confidence interval to estimate the average number of hours per day adults spend in front of screens watching television-related content. The 99% confidence interval to estimate the average number of hours per day adults spend in front of screens watching television-related content is from ___ hours to ___hours. (Round to two decimal places as needed.)Explanation / Answer
margin of error = z-score * std/sqrt(n)
= 2.575 * 2.5324 /sqrt(12)
= 1.8824
lower bound = 4.825 - 1.8824 = 2.9426 = 2.94
upper bound = 4.825 + 1.8824 = 6.7074 = 6.71
hence it is from 2.94 to 6.71
1.3 5.1 4.2 5.4 7.8 7.4 5.9 2.3 5.7 1.5 2.4 8.9 mean 4.825 standard deviation 2.5324