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alexandr402 [8]
3 years ago
10

{8, 15, 9, 18, 9, 17, 22, 10, 11, 9, 13} What is the interquartile range of the data set?

Mathematics
1 answer:
8_murik_8 [283]3 years ago
6 0

Answer:

IQR = 8

Step-by-step explanation:

The interquartile range (IQR) is the difference between the upper quartile Q₃ and the lower quartile Q₁

We require the data arranged in ascending order and to find the median Q₂

The median is the middle value of the data arranged in ascending order.

8, 9, 9, 9, 10, 11, 13, 15, 17, 18, 22

                      ↑ Q₂

The upper quartile is the middle value of the data to the right of the median

13, 15, 17, 18, 22

           ↑ Q₃

The lower quartile is the middle value of the data to the left of the median

8, 9, 9, 9, 10    

        ↑ Q₁

IQR = Q₃ - Q₁ = 17 - 9 = 8

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In this technique, if we have to factorise an expression like  

a

x

2

+

b

x

+

c

, we need to think of 2 numbers such that:

N

1

⋅

N

2

=

a

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c

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1

+

N

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9

and  

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2

=

1

9

⋅

1

=

9

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(

1

)

=

10

3

x

2

+

10

x

+

3

=

3

x

2

+

9

x

+

1

x

+

3

=

3

x

(

x

+

3

)

+

1

(

x

+

3

)

(

3

x

+

1

)

(

x

+

3

)

is the factorised form for the expression.

is the factorised form for the expression.

8 0
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