One Variable Statistics Review

If we use the median to measure the typical value or center of the data, we would use the _________ to measure the variability.

• Mode

• MAD

• Standard Deviation

• IQR or Interquartile Range

The mean life of a tire is 30,000 km. The standard deviation is 2000 km.

Then, 68% of all tires will have a life between ___________ km and __________ km.

•  28,000 km and 32,000 km.

• 24,000 km and 34,000 km.

• 26,000 km and 34,000 km.

• 27,000 km and 31,000 km.

A five number summary includes the minimum, maximum, median, ________ and ___________

• Pizza

• seltzer water

• quarter 1 or Q1

• quarter 3 or Q3

If outliers are removed, what changes more significantly the mean or median?

• Mean

• Median

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

A typical value is found by using either the...

• MAD

• Mean

• Standard Deviation

• Median

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

A box plot divides the data into quarters or 25% increments.

• True

• False

On a recent test, a statistics professor finds that the mean score is smaller than the median. Which of the following could be the distribution of test scores?

• 
• 
• 
• None of these

Which measure of center best represents this set of data?
12, 13, 11, 16, 31, 14, 10, 15

• Mean

• median

• mode