Question

Are these true and false correct?

__F___            20. In a sample of n = 3 scores, if two scores are each below the mean by 2 points, then the third score is above the mean by 4 points.

__F___            21. A sample has n = 5 scores: 2, 4, 5, 8, and 11. The median for the sample is 6.5.

__T___ 22. There are situations for which it is either impossible to compute a mean or the mean does not provide a central, representative value.

__T___            23. A distribution of scores has a mean of 50, a median of 53, and a mode of 56. Based on this information, it appears that the distribution is negatively skewed.

__T___            24. If a negatively skewed distribution has a mean of 50, then the median and the mode are probably both greater than 50.

T_____            25. For a positively skewed distribution, the mean usually has a larger value than either the median or the mode.

Answer 1

20. In a sample of n = 3 scores, if two scores are each below the mean by 2 points, then the third score is above the mean by 4 points. :True

21)  21. A sample has n = 5 scores: 2, 4, 5, 8, and 11. The median for the sample is 6.5 :false

22) There are situations for which it is either impossible to compute a mean or the mean does not provide a central, representative value. True

23)23. A distribution of scores has a mean of 50, a median of 53, and a mode of 56. Based on this information, it appears that the distribution is negatively skewed. True

24)If a negatively skewed distribution has a mean of 50, then the median and the mode are probably both greater than 50. True

25)

For a positively skewed distribution, the mean usually has a larger value than either the median or the mode. True