Statistics: Variance and Answer

6965 words 28 pages
* Question 1
0 out of 2.5 points | | | The least effective way to determine random numbers is toAnswer | | | | | Selected Answer: | use the "pseudo random numbers" produced by the special equations in computers. | | | | | * Question 2
0 out of 2.5 points | | | The items below are based on the following scenario.

In a third world country, 100 randomly selected people were surveyed about their socioeconomic class and religious affiliation. The results and an excerpt from the results section of this fictional study follow.

Observed (and Expected) Frequencies

(NOTE: Expected frequencies are in parentheses.)

Excerpt: "Based on a chi-square test for independence, the working class differed
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| | | | | * Question 19
2.5 out of 2.5 points | | | The rank-order test that would be used in the same kind of research situation as a t test for independent means isAnswer | | | | | Selected Answer: | the Wilcoxon rank-sum test. | | | | | * Question 20
0 out of 2.5 points | | | When conducting a statistical test, a single outlier canAnswer | | | | | Selected Answer: | make the test more robust to violations of the assumption of normality. | | | | | * Question 21
2.5 out of 2.5 points | | | Having discovered an extreme score in a sample of scores, the first thing to do is toAnswer | | | | | Selected Answer: | make sure the score was not recorded in error. | | | | | * Question 22
0 out of 2.5 points | | | When carrying out a chi-square test for independence, a good check on the arithmetic in figuring the expected frequencies is to make sure thatAnswer | | | | | Selected Answer: | the expected frequency of each cell is no larger than the observed frequency. | | | | | * Question 23
2.5 out of 2.5 points | | | In most research situations, randomization tests are conducted byAnswer | | | | | Selected Answer: | computers. | | | |

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