Statistics Probability Honors (Mean, median, mode, SD, Bell curve,)

What is the definition of the "range" of a data set?

The difference between the highest and lowest values

In a box-and-whisker plot, the "whiskers" represent:

The minimum and maximum values

Which of the following is an example of data that might follow a normal distribution?

Scores on a standardized test

If a data set has a mean of 50 and a standard deviation of 10, what is the range of values that lies within one standard deviation of the mean?

40 to 60

A normal distribution is characterized by which of the following?

The mean, median, and mode are all the same

If the standard deviation of a data set is 0, what does that mean about the data?

The data points are all equal

What is the purpose of a box-and-whisker plot?

To show the distribution and spread of data

Which measure of central tendency is most affected by outliers?

Mean

Which of the following is NOT true about a normal distribution?

It is skewed to the right

According to the 68-95-99 rule, what percentage of data falls within two standard deviations of the mean?

95%

In the data set {2, 4, 4, 6, 8, 8, 10}, the mode is

4 and 8

What shape does the graph of a normal distribution have?

Bell-shaped

The variance of a data set is defined as:

The sum of the data minus  the mean, everything squared

In a normal distribution, what percentage of data falls within one standard deviation of the mean?

68%

What happens to the shape of the distribution when the standard deviation increases?

It becomes wider

Which of the following is NOT a measure of central tendency

Standard Deviation

Which measure of spread is used in a box-and-whisker plot?

Interquartile Range

The "68-95-99 rule" is also known as the

Empirical rule

The 68-95-99 rule applies to which type of distribution?

Normal distribution