Qnt351 Week 4 Assessment

QNT/351 Week 4 Individual Assessment

Fill in the blank:

1. A statistical hypothesis is a statement about the numerical value of a population __PARAMETER.__

2. The Null Hypothesis_, denoted H0, represents the hypothesis that will be accepted unless the data provide convincing evidence that it is false. This usually represents the “status quo” or some claim about the population parameter that the researcher wants to test.

3. The _Alternative __ (research) hypothesis, denoted Ha, represents the hypothesis that will be accepted only if the data provide convincing evidence of its truth. This usually represents the values of a population parameter for which the researcher wants to gather evidence to support.

Choose the correct answer:

4. Which is the null hypothesis for this research question: Is the population average amount of TV viewing 12 hours?

__ µ < 12 hours _X_ µ = 12 hours __ µ > 12 hours

5. Which is the null hypothesis for this research question: Is the population average amount of TV viewing different from 12 hours?

X µ = 12 hours __ µ < 12 hours µ ≠ 12 hours

Fill in the blank:

6. The _Test Statistic_is a sample statistic, computed from information provided in the sample, that the researcher uses to decide between the null and alternative hypotheses.

7. A Type _I_ error occurs if the researcher rejects the null hypothesis in favor of the alternative hypothesis when, in fact, H0 is true. The probability of committing a Type I error is denoted by alpha.

8. A Type _II__error occurs if the researcher accepts the null hypothesis when, in fact, H0 is false. The probability of committing a Type II error is denoted by Beta.

True or False:

9. A one-tailed test of hypothesis is one in which the alternative hypothesis is directional and includes the symbol “ < ” or “ >.” _True_

10. The observed significance level, or p-value, for a specific statistical test is...