A news report claims that 32% of households own at least one cat. Believing the true percentage of households that own at least one cat exceeds 32%, a researcher surveys a random sample of 200 households and finds that in 74 of these households, there is at least one cat.  From this information, which one of the following statements is false?单项选择题

A

The test statistic will be equal to approximately 1.5, leading to a P-value close to 0.07.

B

If the significance level is set at 0.05, the decision should be to fail to reject the null hypothesis.

C

If the significance level is set at 0.10, the results will be statistically and practically significant.

D

A one-sided hypothesis test will provide stronger evidence against the null hypothesis than a two-sided test.

E

The alternative hypothesis should be “Ha:  p > 0.32” because the researcher believes the true proportion lies above the claimed parameter.

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

A bark beetle infestation will kill off a pine forest in months. To deal with this problem rangers conduct controlled burns if the bark beetle infests more than 10% of all pine trees in the forest. 1500 randomly selected Tahoe pine trees in a very large national park were tested for traces of the Bark Beetle infestation.  It was found that 153 of the trees showed such traces.  They wish to test that more than 10% of the Tahoe trees have been infested.  (Use a 5% level of significance).  What are the appropriate hypotheses for this test?

Suppose we are interested in the proportion of people who prefer Lays chips to a store brand chip.  In particular, we want to test whether this proportion is greater than 0.5.  In a taste test based on a random sample of 50 people, 29 of them preferred Lays.  Is this compelling evidence that the population proportion is actually greater than 0.5? Let 𝑝 be the population proportion of people who prefer Lays.  What are the appropriate hypotheses for the test?

A movie critic conducts a hypothesis test because he has a theory that the proportion of adults who enjoy scary movies falls well below 0.45.   After surveying a random sample of adults and conducting a hypothesis test, the movie critic reports a P-value of 0.01.  Assuming the movie critic was using a sample size that was large enough to meet hypothesis testing conditions and that no calculation mistakes were made, what can we conclude based on this information?

The implementation and loading phase of the Database Life Cycle (DBLC) involves _____.

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！