interquartile range

Calculate the interquartile range of the following 20 scores2, 3, 5, 7, 9, 11, 15, 17, 19, 20, 20, 21, 23, 30, 31, 32, 33, 35, 37, 40

• 38
• 20.5
• 17
• 21.5

Calculate the interquartile range of the following data17, 18, 18, 19, 20, 21, 21, 23, 25

• 3
• 4
• 5
• 8

Calculate the range of the following 2, 5, 8, 3, 13, 5

• 11
• 13
• 5
• 8

calculate the median for the following set of scores45, 69, 69, 87, 88, 92, 99, 100

• 87
• 55
• 87.5
• 99

find the lower quartile of the following set of scores12, 9, 4, 6, 5, 8, 9, 4, 10, 2

• 10
• 4
• 9
• 6

what is the IQR ( interquartile range)?

• The difference between minimum and maximum
• The difference between median and lower quartile
• The difference between upper quartile and median
• The difference between upper quartile and lower quartile