Year 9 maths Statistics quiz 1A

How do you find the median of a data set that has two middle numbers?

• You pick the higher middle number

• You pick the lower middle number

• Add the two middle numbers and divide it by 2

• Subtract the two middle numbers and divide by 2

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CCSS.6.SP.A.3

CCSS.6.SP.B.5

Which measure of central tendency would best represent this data?

• Mean

• Median

• Mode

• Range

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CCSS.6.SP.A.1

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

Which measure of central tendency best represents this data?

• Mean

• Median

• Mode

• Range

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CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

The mean of this data set is 17.8. What would happen to the mean if 40 was added to the data set?

• The mean would not change

• The mean would go up

• The mean would go down

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CCSS.6.SP.A.3

CCSS.6.SP.B.5

Jada asked some students at her school how many hours they spent watching television last week, to the nearest hour. Here is a histogram for the data she collected. About how many students did Jada ask?

• 30

• 40

• 100

• 15

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CCSS.6.SP.B.5A

Biased or Random?

Reign wants to determine the most popular brand of cereal in all of Australia. So he polls all the houses on his street to get a sample.

• Biased

• Random

What is the median of this data set?

3 , 17 , 17 , 11 , 8 , 13 , 5 , 18

• 11

• 12

• 13

• 17

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CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

What is the median of this data set?
7.3, 2.9, 1.5, 0.6, 3.8

• 2.9
• 3
• 3.5
• 4.3

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CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

Calculate the mean of Shelly's test scores if she has scored 75, 97, and 92 so far this semester.

• 92

• 88

• 132

• 123

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CCSS.6.SP.A.3

CCSS.6.SP.B.5

What is the mode of the following data set?

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

• 5

• 7

• 12

• no mode

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CCSS.6.SP.A.3

CCSS.6.SP.B.5