Читать книгу Student Study Guide to Accompany Statistics Alive! - Wendy J. Steinberg - Страница 26

1 The range is a very sensitive measure of central tendency.

2 Adding 25 different scores to the center of a data set will affect the range.

3 A deviation score provides a measure of the score’s distance from the mean.

4 The sign (+ or −) of a deviation score indicates its location in relationship to the mean.

5 Deviation scores always sum to 1.

6 The variance is the square of the average distance of scores from the mean, measured in squared distance units.

7 Standard deviations from different samples of the same population can be compared.

8 The standard deviation is calculated from the square root of the variance to revert the measure to linear units.

9 The standard deviation is the most commonly used measure of dispersion because of its interpretability and applicability to the normal curve.

10 The mean absolute deviation is used more frequently than the standard deviation.

11 Descriptive statistics are used to describe the characteristics of a sample.

12 The mean and standard deviation are examples of inferential statistics.

13 When using a sample to infer about a population, you should use n − 1 in the denominator.

14 Using n − 1 in the denominator corrects for the bias of sample variance being larger than the population variance.

15 There is a debate in the social sciences regarding the appropriate use of N as opposed to n − 1 in the denominator of sample variances.