Year 8 Statistics pretest Chapter 9

A big jar contains 3000 jelly beans. The jelly beans are blue, red and yellow. A sample of 45 jelly beans is taken, and it is found to contain 27 blue jelly beans. Estimate the number of blue jelly beans in the jar.

• 1200

• 1500

• 1800

• 2000

• 2200

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CCSS.7.SP.A.2

Calculate the mean of this data set. Give your answer correct to two decimal places

3, 3, 4, 5, 7, 8, 8, 12

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CCSS.6.SP.B.5C

Calculate the median of this data set.

3, 3, 4, 5, 7, 8, 8, 12

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CCSS.6.SP.B.5C

Calculate the median of this data set:

11, 12, 14, 14, 16, 17, 20, 25, 26

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CCSS.6.SP.B.5C

Calculate the mode of this data set:

11, 12, 14, 14, 16, 17, 20, 25, 26

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CCSS.6.SP.B.5C

The frequency table shows the number of children per household.

State how many households were included in the data.

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CCSS.6.SP.B.5A

The frequency table shows the number of children per household.

State the number of households with more than one child.

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CCSS.6.SP.B.5A

The frequency table shows the number of children per household.

Calculate the median.

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CCSS.6.SP.B.5C

The frequency table shows the number of children per household.

Calculate the mean.

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CCSS.6.SP.B.5C

The frequency table shows the number of children per household.

State the range.

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CCSS.6.SP.B.4

CCSS.HSS.ID.A.1