AP Statistics 2017

population standard deviations) are equal. This is hard to justify because of the lack of a strong statistic ...

III. The P -value for the test statistic in this situation will be larger for 11 degrees of free ...

Assuming that the speeds are approximately normally distributed, how many degrees of freedom will there be ...

compared. The means and standard deviations for groups A and B are determined as well as the mean and standar ...

vote for him and is overjoyed at his soon-to-be-celebrated victory. Explain carefully why Harvey should not get t ...

and that he was going to win the election. Statistically speaking (say at the 0.05 level), how happy should ...

Solutions to Practice Problems Multiple-Choice The correct answer is (d). for the one-sided alternative. ...

those getting above 80% are the same across the two populations. Free-Response 1. I . Let p 1 = the tr ...

I . Let μ = the true mean score for all students taking the exam. H (^) 0: μ = 520 (or, H 0 : μ ...

T-Test .) IV . Because P > .05, we cannot reject H 0 . We do not have strong evidence to back ...

I . Let p = the true proportion of Wednesday night television viewers who are watching “I Want to Marry ...

(from Table B). (When read directly from Table B, t = –1.48 with df = 10 is between tail probabil ...

for t = –2.84 based on df = 174, P -value = 0.0025, which is very close to the value obtained by us ...

H 0 : μ = 7.3. H (^) A : μ ≠ 7.3. II . We will use a one-sample t confidence interval (at the direct ...

A confidence interval is justified because we are dealing with a random sample from an approximat ...

CHAPTER 12 Inference for Means and Proportions In a study to see if special exercises help babies learn ...

She conducted the experiment and performed a significance test, which resulted in a P -value of 0.77. Wh ...

2. B 3. E 4. D 5. B ...

CHAPTER 13 Inference for Regression IN THIS CHAPTER Summary: In the last two chapters, we’ve considered inferen ...

did in Chapter 7 : example: The following data are pulse rates and heights for a group of 10 female statis ...