7. A Nielsen survey provided the estimate that the mean number of hours of television viewing per household is 7.25 hours per day . assume that the Nielsen survey involved 200 households and that the sample standard deviation was 2.5 hours per day . Ten years ago the population mean number of hours of television viewing per household was reported to be 6.70 hours . Letting = the population mean number of hours of television viewing per household in , test the hypotheses H : μ = 6.70 and
H : μ ≤ 6.70 . use = 0.01