TRUE OR FALSE
1. A t-test is used when the population standard deviation isknown.
2. The degrees of freedom in a t-test is one less than themargin of error.
3. A confidence interval can only be found when the standarddeviation of the population is known.
4. The margin of error for a t-test is calculated using thesample mean.
5. The null hypothesis is a claim made about the sample.
6. The significance level is denoted by n.
7. If the conclusion of a hypothesis test is “fail to reject thenull hypothesis,†then the results are statisticallysignificant.
8. A 95% confidence interval for a population mean must becalculated using the sample mean.
9. A z-score is a test statistic.
10. A t-statistic is the same for a 95% confidence interval anda 90% confidence interval regardless to the same size.
