Simplify the expression.
2 answers:
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<h2>Answer with explanation:</h2>
Let be the population mean.
As per given , we have
a)
Since, the alternative hypothesis is right-tailed , so the test is a right-tailed test.
Given :
z-score :
b) P-value :
Critical value for 0.01 significance level =
c) Test decision : The test statistic value (3.87) is greater than the critical value (2.33), so we reject the null hypothesis.
d) Conclusion : We have enough evidence to support the claim that children from low-income families are exposed to more than 4.0 hours of daily background television.