Measures of Relative Standing

The mode score on the 6th grade math test was 94! Which of these interpretations must be correct?

• 94 was the highest score on the test.

• More students received a 94 than any other score

• No student scored below a 94

• A score of 91 was slightly below average.

The mode score on the 6th grade math test was 94! Which of these interpretations MUST be correct?

• 94 was the highest score on the test.

• More students received a 94 than any other score

• No student scored below a 94

• A score of 91 was slightly below average.

calculate the median for the following set of scores

45, 69, 69, 87, 88, 92, 99, 100

• 87

• 55

• 87.5

• 99

How do you find the Interquartile Range?

• divide the 3rd quartile (Q3) by the 1st quartile

• subtract the biggest number by the smallest number

• divide the biggest number by the smallest number

• subtract the 3rd quartile (Q3) by the 1st quartile (Q1)

Find the relative frequencies

• 37%, 76%, 92%, 95%, 98%, 100%

• 28%, 30%, 12%, 2%, 2%, 2%

• 33%, 37%, 20%, 7%, 7%, 7%

• 37%, 39%, 16%, 3%, 3%, 3%

Find the Lower Quartile (Q1) of the following numbers:

84, 88, 72, 74, 98, 16, 94

• 72

• 88

• 94

• There is no Lower Quartile.

Find the Upper Quartile (Q3) of the following numbers:

84, 88, 72, 74, 98, 16, 94

• 72

• 88

• 94

• There is no Upper Quartile.

Find the IQR of the following numbers:
84, 88, 72, 74, 98, 16, 94 

• 78

• 22

• 16

• There is no IQR.

Find the 1st (Q1) , 2nd (Median), and 3rd (Q3) quartile of the data set:

• 1st: 3, 2nd: 6, 3rd: 14

• 1st: 13, 2nd: 5.5, 3rd: 2.5

• 1st: 2.5, 2nd: 5.5, 3rd: 12

• 1st: 14, 2nd: 6, 3rd: 3

What is the IQR of this data set?

• 5

• 6

• 8

• 9