Mean, Median, Mode, Range & IQR

Find the Median

100

Define Median

Median: The number in the middle of a data set

200

What is the "formula" to find the position of the median?

Median position= n+1/2

300

Find the Median. 86, 24, 65, 65, 24, 24

Median = 44.5

400

Find the Median. 32, 23, 22, 33, 33, 23, 32, 23, 22

Median = 23

500

Write the 5 number summary for the following set of data: 35, 56, 34, 44, 52, 12, 34, 45

min. 12

Q1. 34

Q2 (Median). = 39.5

Q3. 48.5

Max. 56

Finding IQR

100

Find the IQR from the following 5 number summary. 

Min. 4

Q1. 7

Q2. 12

Q3. 20

Max. 25

IQR = 20-7=13

200

Find the IQR. 24, 34, 32, 16, 45, 38, 28

IQR = 14

300

Define:IQR

The upper quartile (Q3) minus the lower quartile (Q1).

400

Find the IQR. 86, 24, 65, 65, 24, 24

IQR = 41

500

Find the IQR. 32, 23, 22, 33, 33, 23, 32, 23, 22

IQR = 10

Mean

100

What word should you think of when you are asked to find the Mean?

Average

200

What is the "formula" to find the mean from a set of data?

Sum of all scores/number of scores

300

What does n stand for?

n= number of scores in the data set

400

Find the mean number of baskets scored by a player who played in 6 games scoring 15, 5, 22,10, 12, 8

72/6= 12

500

Find the Mean. 24, 34, 32, 16, 45, 38, 28, 22, 19

258/9= 28.7

Mode & Range

100

Define: Mode & Range

Mode: Appears the most

Range: The distance the data set covers

200

Find the Mode, & Range. 24, 34, 32, 16, 45, 38, 28

Mode = No Range = 29

300

Find the Mode, & Range. 86, 24, 65, 65, 24, 24

Mode = 24 Range = 62

400

Find the Mode, & Range. 32, 23, 22, 33, 33, 23, 32, 23, 22

 Mode = 23 Range = 11

500

Find the Mode & Range. 35, 56, 34, 44, 52, 12, 34, 45

Mode = 34 Range = 44

Which one would I use?

100

You want to find the average height of a basketball team. Which central tendency would you use?

Mean

200

To determine the difference between the shortest and tallest person on a basketball team. Which measure of spread would you use?

Range

300

You have a range of answers from a particular survey. You are trying to figure out the middle of the data. Which central tendency would you use?

Median

400

You survey a group of people asking them what their favorite food is. Which central tendency would you use to determine the most popular food?

Mode

500

You have taken 4 exams this year, you know all 4 test scores and want to know what you will get on your report card. Which measure of central tendency should you use?

Mean