© 2013 Pearson Education, Inc. Active Learning Lecture Slides For use with Classroom Response Systems Introductory Statistics: Exploring the World through Data, 1e by Gould and Ryan Chapter 9: Inferring Population Means Slide 9 - 1

If the conditions fail to be met for a hypothesis test, the z-statistic will not follow a Normal distribution when the null hypothesis is true. A. True B. False Slide © 2013 Pearson Education, Inc. Response Counter

The following statements are true about the power of a test. A. The larger the sample size, the bigger the power. B. Power is the probability of rejecting the null hypothesis when it is wrong. C. The smaller the significance level, the smaller the power. D. All of the above Slide © 2013 Pearson Education, Inc. Response Counter

While setting up our hypothesis test, we should always make the significance level as small as possible A. True B. False Slide © 2013 Pearson Education, Inc. Response Counter

If the p-value is greater than  then the appropriate conclusion is (check all that apply): A. Fail to reject H 0 B. Accept H 0 C. There is not sufficient evidence to support H a D. All of the above Slide © 2013 Pearson Education, Inc. Response Counter

True or False The accuracy of an estimator is measured by the standard error. A. True B. False Slide © 2013 Pearson Education, Inc. Response Counter

True or False A sampling distribution is a probability distribution of a statistic. A. True B. False Slide © 2013 Pearson Education, Inc. Response Counter

True or False When a statistic of the sampling distribution is the same value as the population parameter, we say that the statistic is an unbiased estimator. A. True B. False Slide © 2013 Pearson Education, Inc. Response Counter

True or False The standard deviation of the sampling distribution is what we call the standard error. A. True B. False Slide © 2013 Pearson Education, Inc. Response Counter

True or False The standard error of the sample mean, gets smaller with larger sample size. A. True B. False Slide © 2013 Pearson Education, Inc. Response Counter

True or False For all populations, the sample mean is unbiased when estimating the population mean. A. True B. False Slide © 2013 Pearson Education, Inc. Response Counter