8.. 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 u= the population mean number of hours of television viewing per household in , test the hypotheses H : µ< 6.70 and H : u> 6.70 . use a = 0.01 !

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.