(500, 504) None of the provided answers. QUESTION 8 A study was conducted in order to estimate , the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 100 U.S. adults gives a mean weekly computer usage time of 7.5 hours and that from prior studies, the population standard deviation is assumed to be o = 3.0 hours. We are 95% confident that the mean number of weekly hours that U.S. adults use computers at home is: between 6.9 and 8.1. between 7.8 and 8.1. between 7.2 and 7.8. between 6.9 and 7.8. between 6.6 and 8.4. Click Save and Submit to save and submit. Click Save All Answers to save all answers