Week3 Practice Worksheet #6

Week3 Practice Worksheet #6

Week3 Practice Worksheet #6

psychology practice

6. A psychology professor of a large class became curious as to whether the students who turned in tests first scored differently from the overall mean on the test. The overall mean score on the test was 75 with a standard deviation of 10; the scores were approximately normally distributed. The mean score for the first 20 students to turn in tests was 78. Using the .05 significance level, was the average test score earned by the first 20 students to turn in their tests significantly different from the overall mean?

a. Use the five steps of hypothesis testing.

b. Figure the confidence limits for the 95% confidence interval.

19. Which BEST represents an unobtrusive measure of marital adjustment?

20. “How can group differences on cognitive ability tests be reduced while retaining existing high levels of reliability and criterion-related validity?” According to Gottfredson, the answer to this question

21. “The effect of instituting this remedy for adverse impact is to make equivalent all scores that fall within a particular range.” Here, the “remedy for adverse impact” is more technically referred to as

22. A psychologist wants to determine the criterion-related validity of an intelligence test by determining how well it predicts a student’s placement in a special class. If the psychologist used the intelligence test for both diagnosis and special class placement, that criterion would be said to be

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