A sample of n= 20 scores has a mean of M = 55. After one score is removed from t

Question

A sample of n= 20 scores has a mean of M = 55. After one score is removed from the sample, the mean for the remaining scores is found to be M = 51. From this information you can conclude that the removed score was _____. a. greater than 55 b. less than 55 c. equal to 55 d. it is not possible to estimate the magnitude of the score from the information provided The value for the interquartile range is determined by ________. a. the extreme scores (both high and low) in the distribution b. the extremely high scores in the distribution c. the middle scores in the distribution d. all of the scores in the distribution In general, what is the relationship between the standard deviation and variance? a. standard deviation equals the squared variance b. variance is the squareroot of standard deviation c. standard deviation is the squareroot of variance d. these two measures are unrelated A researcher observed that preschool children playing in a red room showed more aggression than children playing in a blue room. For this study, what is the independent variable? a. Preschool children b. Color of the room c. Amount of aggression d. The children's play The width of the bars in a histogram is determined by ______. a. the real limits of a score or class interval b. the apparent limits of a score or interval c. the frequency of a score d. cumulative frequency

Explanation / Answer

6. the correct option is c

7. the correct option is c

8.the correct option is b

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