Big Ideas Chapter 9 Data

Ages of teachers (in years): 30, 62, 26, 35, 45, 22, 49, 32, 28, 50, 42, 35; Find the 5 data values that make up a box-and-whisker plot.

• Lower Extreme: 30, First Quartile 29, Median 34.5, Third Quartile 47, Upper Extreme 62

• Lower Extreme: 22, First Quartile 29, Median 35, Third Quartile 47, Upper Extreme 62

• Lower Extreme: 22, First Quartile 29, Median 32, Third Quartile 47, Upper Extreme 62

• Lower Extreme: 30, First Quartile 28, Median 42 Third Quartile 46, Upper Extreme 62

What is the interquartile range (IQR)?

• 60

• 64

• 4

• 8

Identify the shape of distribution of the box-and-whisker plot. Explain.

• Skewed right; because the left whisker is longer

• symmetric; whiskers are about the same length

• Skewed left; because the right whisker is longer

• Skewed left; because the left whisker is longer

Which interval shows the greatest number of pets?

• 15-19

• 0-4

• 5-9

• 10-14

Which box and whisker plot has the smallest lower quartile (Q1)?

• Top plot

• Bottom plot

What is the interquartile range (IQR) of plot A?

• 6

• 8

• 15

• 28

If I want to make sure I have data in the top 50% of plot A, I should make sure to pick a number greater than what amount?

• 14

• 30

• 18

• 22

Who has a larger IQR?

• Zach

• Steven

• They have the same IQR

Who has a Median of 1?

• Zach

• Steven

• They both have a median on 1

Find the Median of the data.

• 12

• 14

• 20

• 5