Based on a random sample of 1180? Adults, the mean amount of sleep per night are 8.06 hours. Assuming the population standard deviation for amount of sleep per night is 1.2 hours, construct and interpret a 90? % confidence interval for the mean amount of sleep per night

90? % confidence interval is _________

Answer rating: 100% (QA)

The confidence level is 090 For 1 090 010 2 010 2 005 From the Standard Normal Table the requirement is Z 005 That is PZ z 005 Procedure for finding t... View the full answer