Statistics One Variable

A distribution whose dot plot or histogram takes the form of a bell with most of the data clustered near the center and fewer points farther from the center

• Bell-Shaped Distribution

• Bimodal Distribution

• Skewed Distribution

• Uniform Distribution

The given distribution is skewed left. Compare the median and the mean.

• The median and the mean are the same because they both are measures of center

• The median is less than the mean since the distribution is skewed left.

• The median is greater than the mean since the distribution is skewed left.

• There is not enough information to compare the median and the mean.

Which class has the higher test score median? 

• Class #1

• Class # 2 

• The medians are equal

• The median is not shown here. 

The double line plot shows the number of students who attended the home games of the baseball team for two recent seasons. Which of the following statements is NOT true.

• The median attendance for 2009 was less than the median attendance than 2010.

• The attendance for 2010 was more consistent, so the standard deviation would be smaller than the standard deviation for 2009.

• The attendance for 2009 was more consistent, so the standard deviation would be smaller than the standard deviation for 2010.

• The attendance for 2010 ranged from 20-27.

Which car club has the higher median?

• Cruisers

• Car Hops

• Their medians are the same

• You can not tell from the box plots

The median is the...

• average of all data values

• the most frequently occurring number

• the difference between the biggest and smallest value

• the middle value

Which data set shows a greater spread (larger IQR)?

• Chess Club

• Checkers Club

• They have the same spread.

• You cannot tell from the box plots.

Here are the times (in minutes) that six students needed to finish a quiz: 10, 14, 15, 15, 14, 10 The standard deviation for this data is 2. A seventh student took 8 minutes to finish the quiz. We added his time to our data. What will happen to the standard deviation?

• It will decrease because our range is bigger.

• It will increase because our range is bigger.

• It will not change.

• It will decrease because we have more numbers in our data set.

A distribution where one side of the distribution has more values farther from the bulk of the data than the other side, so that the mean is not equal to the median

• Bell-Shaped Distribution

• Skewed Distribution

• Uniform Distribution

• Bimodal Distribution

The mean gets pulled away from the center of data or the typical value when the data is skewed to the right or left.

• True

• False