Question

Nationally the population as a whole watches an average of 6.2 hours of television a day. A random sample of 150 senior citizens report watching an average of 6.1 hours per day. Assume a population standard deviation of 0.7 hours. Is this sufficient evidence to conclude that the amount of television that senior citizens watch on average is different than 6.2 hours? Use alpha=.05

Answer 1

Solution - we have, a=0.05 -D=150, X=6:1 6= 0.7 Nulland Alternative hypotbesis is, - Ho ll=6.2 Hii U + 6:2 test statistics is Z - 6:1-6.2 07/1150 = X-U 6/N Z= -0.1 0.0572 2= -1,7483 P-value = P(1Z1 <--1.7483) = 0.0805 _ Here, p-value > x=0:05 we tail to reject Ho Conclusion - We tril to rejeet Ho. There is not sufficient evidence to conclude that the amount at television that senior citizens watch on Lavoragewitte's different than 6:2 bocess. CamScanner