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 51 16 5.3 7.8 21 6.90 8.8 29 13 52 hours to hours a. Construct a 90% confidence interval to estimate the average number of hours per day adults spend in front of screens watching television-related content The 90% confidence interval to estimate the average number of hours per day adults spend in front of screens watching television-related content is from (Round to two decimal places as needed) b. What assumptions need to be made about this population? O A. The only assumption needed is that the population distribution is approximately uniform OB. The only assumption needed is that the population standard deviation is known C. The only assumption needed is that the population distribution is approximately normal OD. No assumptions are required

Answer 1

From the data, we calculate še = 4.67 , S = 2.3986, 7212 For a=0.05. tahint to.025, 11 = 2.201 The 909/ CI is, (x - I tapin x + 3 h toys in ) 2.3986 is 2.3986 X2.201 x 2.201 4.67 + ( :) 4.67 - Viz V12 id, (3.15 6.19) The ao% to CI estimal number of hours the average adults spend in front of screens watching related content from 3.15 hours to 6.19 hours per day television

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