Ch 4 Key Terms

statistics that provide an analysis of data to help describe, show, or summarize the data in a meaningful way such that, for example, patterns can emerge from the data

statistics that describe how often something occurs

a graph used to depict a count

a frequency distribution presented as a bar graph with the y axis representing the frequency and the x axis the values of the scores

same as average; a descriptive statistic that balances the scores above and below it

the location of the center of a distribution

a descriptive statistic indicating the score value that divides the distribution into equal lower and upper halves of the scores

the score value that occurs most frequently in the distribution

a type of frequency distribution that represents many data points distributed in a symmetrical, bell-shaped curve.

a descriptive statistic that indicates the lowest and highest scores

a frequency distribution in which one tail is longer than the other

a descriptive statistic that expresses the amount of spread in the frequency distribution and the average amount of deviation by which each individual score varies from the mean

an estimate of the standard deviation of multiple samples represneting the standard deviation for the population

the spread of scores in a distribution