Chapter 3 - Describing, Exploring, and Comparing Data

Solid horizontal line

________ extends only as far as the minimum data value that is not an outlier and the max data value that is not an outlier.

coefficient of variation

The ________ (or CV) describes the standard deviation relative to the mean.

Quartiles

________ are measures of location, denoted Q1, Q2, Q3, which divide a set of data into 4 groups with about 25 % of the values in each group.

z score

A(n) ________ is the number of standard deviations that a given value x is above or below the mean.

Percentiles

________ are 1 type of quantiles, or fractiles, which partition data into groups with roughly the same number of values in each group.

standard deviation

The variance of a set of values is a measure of variation equal to the square of the ________.

data values

A weighted mean is computed when different x ________ are assigned different weights w.

median

The ________ does not directly use every data value.

original data values

The units of variance are the squares of the units of the ________.

Percentiles

________ are measures of location, which divide a set of data in 100 groups with about 1 % of the values in each group.

Z scores

________ have no units of measurement.

Median

________ does not change by large amounts when we include just a few extreme values, so the ________ is a resistant measure of center.

Standard deviation

________: a set of sample values, denoted by s, is a measure of how much data values deviate away from the mean.