Understanding Dot Plots and Measures of Central Tendency

What does each dot on the dot plot represent?

• The average number of siblings

• The total number of people surveyed

• Each individual person surveyed

• The number of siblings a person has

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CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

How many people stated they have no siblings?

• 4

• 3

• 2

• 6

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CCSS.1.MD.C.4

What is the mode of the data collected from the survey?

• 0

• 4

• 6

• 3

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CCSS.6.SP.B.5C

Which measure of central tendency indicates the most common number of siblings?

• Median

• Mode

• Range

• Mean

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CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

What is the range of the siblings data from the survey?

• 4

• 7

• 5

• 6

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CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

How is the median of the data determined?

• By subtracting the largest value from the smallest

• By identifying the middle number in the ordered data

• By averaging all the data points

• By finding the most frequent number

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CCSS.6.SP.B.5C

What is the median number of siblings according to the survey?

• 4

• 3

• 2

• 0

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CCSS.6.SP.B.5C

How do you calculate the mean number of siblings?

• Find the most frequent number

• Subtract the largest number from the smallest

• Identify the middle number

• Add all the numbers and divide by the total count

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CCSS.6.SP.B.5C

What is the mean number of siblings?

• 2.5

• 3.0

• 2.7

• 1.8

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CCSS.6.SP.B.5C

Why can't you have 2.7 siblings in reality?

• Because the calculation is wrong

• Because it's the median, not the mean

• Because the survey is incorrect

• Because siblings must be a whole number