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Question :
21)If a cognitive psychologist finds that a group of one-year-old : 1991689

21)If a cognitive psychologist finds that a group of one-year-old children can name 3, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10, and 35 things, the most useful measure of central tendency will be the

A)mean.

B)median.

C)mode.

D)range.

22)A distribution is negatively skewed. The measures of central tendency are most likely to be in this order

A)mean = 30, median = 50, mode = 70

B)mean = 30, median = 70, mode = 50

C)mean = 50, median = 50, mode = 50

D)mean = 70, median = 50, mode = 30

23)When a distribution is skewed to the right

A)the median is greater than the mean.

B)the mean and the median are the same.

C)the mean is greater than the median.

D)the mean and the median are equal.

24)The median is greater than the mean in a distribution that is

A)symmetrical.

B)skewed to the right.

C)normal.

D)skewed to the left.

25)In a symmetrical distribution with a mean of 15, the median would be

A)equal to 15

B)less than 15

C)greater than 15

D)either B or C

26)The variance is the same as the

A)average of the squared deviations.

B)sum of the squared deviations.

C)average of the absolute deviations.

D)sum of the absolute deviations.

27)The symbol for the variance used in this chapter is

A)*SD*^{2}

B)*SD*

C)√*SD*^{2}

D)Σ(*X*−*M*)^{2}

28)The formula for the standard deviation used in this chapter is

A)*SD*^{2}

B)*SD*

C)√*SD*^{2}

D)Σ(*X*−*M*)^{2}

29)If the variance is 9, then the standard deviation is

A)18

B)81

C)3

D)4.5

30)If the standard deviation is 4, the variance is

A)2

B)4

C)8

D