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Active Learning Lecture Slides

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1 Active Learning Lecture Slides
Chapter 18 Inference for Counts Active Learning Lecture Slides For use with Classroom Response Systems

2 The most common null hypothesis for a chi-squared test specifies that the variables that define a contingency table are… dependent. independent. differences in distribution might be the result of sampling variation. all of the above.

3 The most common null hypothesis for a chi-squared test specifies that the variables that define a contingency table are… dependent. independent. differences in distribution might be the result of sampling variation. all of the above.

4 A chi-squared test is a hypothesis test based on the size of the chi-squared statistic.
True False

5 A chi-squared test is a hypothesis test based on the size of the chi-squared statistic.
True False

6 A chi-squared test of independence tests the independence of two categorical variables using counts in a contingency table. True False

7 A chi-squared test of independence tests the independence of two categorical variables using counts in a contingency table. True False

8 The conditions needed for chi-squared test of independence are…
no obvious lurking variables. SRS condition. sample size condition. table categories are mutually exclusive. all of the above.

9 The conditions needed for chi-squared test of independence are…
no obvious lurking variables. SRS condition. sample size condition. table categories are mutually exclusive. all of the above.

10 The sampling distribution of the chi-squared statistic if the null hypothesis is true is called the…
normal distribution. chi-squared distribution.

11 The sampling distribution of the chi-squared statistic if the null hypothesis is true is called the…
normal distribution. chi-squared distribution.

12 A chi-squared distribution is closely related to a normal distribution, and looks very similar.
True False

13 A chi-squared distribution is closely related to a normal distribution, and looks very similar.
True False

14 Each chi-squared distribution is identified by a parameter known as the…
p-value. degrees of freedom. goodness of fit. none of the above.

15 Each chi-squared distribution is identified by a parameter known as the…
p-value. degrees of freedom. goodness of fit. none of the above.

16 The p-value is the area beneath the chi- squared distribution to the right of the observed statistic. True False

17 The p-value is the area beneath the chi- squared distribution to the right of the observed statistic. True False

18 The chi-squared test is a general test and cannot match the power of a more specific test.
True False

19 The chi-squared test is a general test and cannot match the power of a more specific test.
True False

20 A test of the distribution of a single categorical variable is called the…
p-test. degrees of freedom. chi-squared test of goodness of fit. test for randomness.

21 A test of the distribution of a single categorical variable is called the…
p-test. degrees of freedom. chi-squared test of goodness of fit. test for randomness.


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