Median and Range and Iqr

What is the IQR?

• 5.5

• 4

• 4.5

• 6

The IQR represents the middle ___________ of the data.

• 25%

• 50%

• 75%

• 100%

How do you find Interquartile Range (IQR) ?

• Find the average of the quartiles

• Find the lowest quartile

• Subtract Quartile 1 from Quartile 3

Find the interquartile range (IQR) of the data set:

17, 8, 5, 10, 8, 26, 28, 7, 18, 10

(a)  

Using the box plot above, how would I find the Interquartile Range (IQR)?

• 50-30

• 60-30

• 60+30

• 80-20

Find the IQR of The Cruisers and The Car Hops

The IQR of the Cruisers is ​ (a)  

The IQR of the Car Hops is ​ (b)  

• 6

• 4

• 13

• 9

• 7

• 16

• 3

Find the interquartile range using the following data

4, 4, 4, 4, 5, 6, 7, 7, 7

• 3

• 1.5

• 2

• 6

Find the median, first quartile, third quartile, and interquartile range of the data.

• Median: 189

  First Quartile: 182

  Third Quartile: 203

  IQR: 21

• Median: 189.5

  First Quartile: 182

  Third Quartile: 203

  IQR: 21

• Median: 189

  First Quartile: 182

  Third Quartile: 203.5

  IQR: 21.5

• Median: 189.5

  First Quartile: 182

  Third Quartile: 203.5

  IQR: 21.5

Use the interquartile range to identify any outliers in the following data.

23, 22, 25, 16, 27, 43, 29, 40, 35

• No outliers.

• 43 is an outlier.

Use the interquartile range to identify any outliers in the following data.

52, 63, 55, 56, 62, 54, 59, 60, 53, 61, 88

• No outliers.

• 88 is an outlier.