Question

What is the interquartile range of the following data set?

7.7, 8.4, 9, 8, 6.9

a.1.75
b.1.4
c.0.25
d.0.4

Answer 1

I did this before with you, remember? Do you remember how to find the lower quartile, and the upper quartile?

Answer 2

different question same numbers

Answer 3

To find the interquartile range, you do the upper quartile subtract by the lower quartile.
What's the upper quartile, and the lower quartile?

Answer 4

7.7 and 6.9

Answer 5

Nope. It's a slightly different question. What's the median?

Answer 6

8.4

Answer 7

Hmm. Are you sure? Order the data set for me to least to greatest.

Answer 8

6.9,7.7,8.4,8,9

Answer 9

So 8 is greater than 8.4?

Answer 10

oh ok

Answer 11

8

Answer 12

Alright. So 8 is the median. You know how to find the median for the 2 data set?

Answer 13

no

Answer 14

Alright. So the median is inbetween the 2 numbers. To find the median, you want to add the 2 numbers, and divide it by 2. This would give you the median.

So what does (6.9 + 7.7)/2 give you?

Answer 15

7.3

Answer 16

Great! What about the other data set. What does that give you?

Answer 17

8.7

Answer 18

Good job! I hope this help!