The data set below represents the total number of touchdowns a quarterback threw each season for 10 seasons of play.

29, 5, 26, 20, 23, 18, 17, 21, 28, 20
Order the values:
5, 17, 18, 20, 20, 21, 23, 26, 28, 29
Determine the median:
StartFraction 20 + 21 Over 2 EndFraction = StartFraction 41 Over 2 EndFraction = 20.5
Calculate the measures of variability for the data set.

The range is
touchdowns.

The interquartile range is
touchdowns.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?