Please help with the entirety of question #7. Construct the confidence interval, probability statement, and explanation. I have included answers given by my teacher so you may check your work(: thank you!!

7. Based on a random sample of 1120 Americans 15 years of age or older, the mean amount of sleep per night is 8.17 hours according to the American Time Use Survey conducted by the Bureau of Labor Statistics. Assuming the population standard deviation for amount of sleep per night is 1.2 hours, construct a 98% confidence interval for the mean amount of sleep per night of Americans 15 years of age or older. x = sleep per night of Americans 15 years no of age or older where does STDEV come from? ANSWERS FOR # 7: 8. 087 6253 probability statement explanation We are 98% confident That P ( ) = .98