Chapter 2: Central Tendency And Variability Question Preview (ID: 58763)


Statistics For Psychology. TEACHERS: click here for quick copy question ID numbers.

The correct description of the mean is
a) the sum of the scores that is most frequent in a distribution.
b) the middle score if all the scores are ordered from lowest to highest.
c) the average of the squared deviations from the median.
d) the sum of the scores divided by the number of scores.

The ΣX for the scores 1, 1, 8, and 10 is
a) 4
b) 4.5
c) 5
d) 20

In statistical formulas, N stands for
a) the number of different values for a variable.
b) the number of scores.
c) the normal curve.
d) the normalized Z score.

The mean and the mode for a statistics test will be the same if the distribution is
a) skewed.
b) normal.
c) bimodal.
d) multimodal.

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.

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.

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.

If the variance is 9, then the standard deviation is
a) 18
b) 32
c) 3
d) 91

SS refers to
a) SD²
b) variance computed using the N−1 formula
c) standard deviation
d) Σ(X−M)²

A psychologist studying cultural diversity who conducts a few lengthy interviews with members of various cultural communities is using
a) behavioral techniques.
b) quantitative techniques.
c) qualitative techniques.
d) positivistic techniques.

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