Module 9: Quiz 1

Find the mean of the numbers below:

3, 2, 1, 3, 2, 1, 3, 2, 1, 3, 2, 1

• 3

• 2

• 1

• 4

Find the median for the set of numbers:

23, 37, 11, 58, 13, 45

• 30

• 23

• 37

• 28

What is the mode of the following data set?

5, 7, 7, 8, 12 , 12, 5, 6, 13, 12

• 5

• 7

• 12

• no mode

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

32, 53, 72, 66, 47, 54, 49, 67, 71

• Median: 54

  First Quartile: 49

  Third Quartile: 67

  IQR: 18

• Median: 54

  First Quartile: 48

  Third Quartile: 69

  IQR: 21

• Median: 54

  First Quartile: 48

  Third Quartile: 69

  IQR: 22

• Median: 54

  First Quartile: 49

  Third Quartile: 69

  IQR: 20

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

203, 183, 212, 181, 157, 204, 189, 190

• 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

How do you calculate the IQR?

• Q2 - Q1

• Q1 - Q3

• Q3 - Q2

• Q3 - Q1

What is the definition of the mean?

• The middle number

• The difference between the highest and lowest numbers

• The average

• The number that occurs the most

When finding the median, what do you do if there are two middle numbers?

• Give up

• Pick one

• Write them both as your answer

• Add them together and divide by 2

Median is the

• data

• average

• most frequent

• middle of the numbers

What is the term for the median of the lower half of the data?
Hint: Look at your notes!

• Lower Quartile
• Upper Quartile
• Median
• Maximum