If height is normally distributed with a mean of 68\" and a standard deviation o

Question

If height is normally distributed with a mean of 68" and a standard deviation of 2", how tall is someone whose height is exactly two standard deviations above the mean? A) 66" tall B) 74" tall C) 72" tall D) not enough Information The mean score on a test of trait anxiety is 100. If someone scored exactly 100, what would his or her score be if it were expressed as a z-score? A) 1.00 B) -.50 C) .00 D) not enough Information When a raw score translates into a negative z-score, the corresponding percentile into which that score falls must be... A) exactly at the 50^th. B) below the 50^th. C) above the 50^th. D) negative. What does it mean if a student's score on a standardized test falls into the 85^th percentile? A) The student got 85% of the questions correct. B) The student got 85% of the answers wrong. C) The student scored lower than 85% of all the students who took the test. D) The student scored higher than 85% of all the students who took the test. If a student's score on a reading test is 1.22 standard deviation units above the mean... A) It falls into the 12^th percentile. B) it is a below-average score. C) its z-score equivalent is +1.22. D) not enough information If 25% of all the scores in a normal distribution fall between a z-score of .67 and the mean, what percent of all the scores in that distribution fall between a z-score of -.67 and the mean? A) 50% B) 67% C) 25% D) It depends on the value of the mean. By using _____ researchers are able to make conclusions about an entire group by measuring a subset of that group. A) descriptive statistics B) inferential statistics C) measurement theory D) probability theory Sampling error is assumed to result... A) only when we make a mistake in measuring a variable. B) only when a non-random sample is selected. C) only when a biased sample is selected. D) when any sample is selected - it's expected. A statistically significant finding is a finding that... A) is especially meaningful. B) is greater than 0 but less than 1. C) has important implications. D) can be generalized to the population.

Explanation / Answer

10. C) 72" tall

11. C) 0.00

12. B) Below the 50th

13. D) The student scored higher than 85% of all the students who took the test

14. C) Its z score equivalent is +1.22

15. C) 25%

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