Читать книгу Student Study Guide to Accompany Statistics Alive! - Wendy J. Steinberg - Страница 33

1 The variance is 0.56.

2 n – 1 is used in the denominator to correct for a sample’s underestimation of the variability in a population.

3 It would increase the dispersion.

4 Descriptive statistics are those that summarize the data in a sample. Examples of this type of statistic are measures of central tendency and dispersion.

5 Inferential statistics are used to make estimates about a population from a sample. They are important because it can be very difficult to directly measure a population.