Statistics Quiz 2

What is the median of the data?

• 200
• 100
• 90
• 140

What percentage of the data is between 90 and 140?

• 25 %
• 50%
• 75%
• 100%

What is the range of the set of data?

• 70
• 65
• 80
• 55

What is the interquartile range (IQR)?

• 4
• 64
• 60
• 8

What is the interquartile range (IQR) of the data set?

• 20
• 25
• 5
• 10

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

• Top plot
• Bottom plot

The mean of 6 numbers is 5.5.  The first five numbers are 2, 5, 6 , 7, 8.  Find the sixth number.

• 33
• 28
• 5.5
• 5

The mean of four numbers is 12.25.  The first three numbers are 16, 12, and 11.  Find the fourth number.

• 10
• 39
• 49
• 1

The mean of seven numbers is 7. The first six numbers are 2 , 3, 6 , 8, 9, and 10.  Find the 7th number.

• 38
• 11
• 49
• 2

How do you find the mean?

• the number that occurs the most
• the number that is in the middle
• subtract the largest number and the smallest number in the data set
• add the numbers in the data set and then divide by how many numbers are in the data set