Chapter 3

Measure of center

A value at the center or middle of a data set is​ a(n) _______

descriptive

Methods used that summarize or describe characteristics of data are called​ _______ statistics

Z-score

When a data value is converted to a standardized scale representing the number of standard deviations the data value lies from the​ mean, we call the new value a​ _______.

Range

Which measure of variation is very sensitive to extreme​ values?

B. In a symmetric and​ bell-shaped distribution, the​ mean, median, and mode are the same.

Which of the following is always​ true?. A. For skewed​ data, the mode is farther out in the longer tail than the median. B. In a symmetric and​ bell-shaped distribution, the​ mean, median, and mode are the same. C. The mean and median should be used to identify the shape of the distribution. D. Data skewed to the right have a longer left tail than right tail.

The empirical rule

For data sets having a distribution that is approximately​ bell-shaped, _______ states that about​ 68% of all data values fall within one standard deviation from the mean.

S=Range/4

The Range Rule of Thumb roughly estimates the standard deviation of a data set as​ _______