BNAD Chapter 9
12. The null hypothesis in a hypothesis test refers to________.
B. The default state of nature
11. The critical value approach specifies a range of values, also called the rejection region, such that if the value of the test statistic falls into this range, we do not reject the null hypothesis
False
7. A Type II error is made when we reject the null hypothesis and the null hypothesis is actually false.
False
On the basis of sample information, we either "accept the null hypothesis" or "reject the null hypothesis
False
The alternative hypothesis typically agrees with the status quo
False
10. Under the assumption that the null hypothesis is true as an equality, the p-value is the likelihood of observing a sample mean that is at least as extreme as the one derived from the given sample.
True
5. In a one-tailed test, the rejection region is located under one tail (left or right) of the corresponding probability distribution, while in a two-tailed test this region is located under both tails.
True
6. A Type I error is committed when we reject the null hypothesis which is actually true.
True
8. For a given sample size, any attempt to reduce the likelihood of making one type of error (Type I or Type II) will increase the likelihood of the other error.
True
9. A hypothesis test regarding the population mean μ is based on the sampling distribution of the sample mean X bar.
True
As a general guideline, we use the alternative hypothesis as a vehicle to establish something new, or contest the status quo, for which a corrective action may be required.
True
The null hypothesis typically corresponds to a presumed default state of nature
True