Statistics Chapter 3

False

A box-and-whisker plot displays the mean of the data set.

b. it is highly influenced by outliers.

A disadvantage of using the range as a measure of variability is that ____________________.

b. z-scores can be positive or negative for data values above the mean of the distribution.

Which of the following statements is not true concerning the attributes of z-scores?

True

True or False. Central tendency is where the majority of the data points can be found in a histogram.

False

True or False. One disadvantage of using the median is that it can be heavily influenced by outliers.

False

True or False. The unit of measure for the variance is the same as the unit of measure for the original data.

True

True or False. The z-score has no units even though the original values will normally be expressed in units such as dollars, years, pounds, or calories.

False

True or False. There can be only one mode in a data set.

True

True or False. When you rely on the mean to summarize many data values, you lose important information about the original data.

standard deviation

The _____________________ is the most common and most important measure of variability in the field of statistics.