Display Numerical Data

Display Numerical Data

By Jade Carty

Multiple Choice

Which is a statistical question?

• How many points did you score in the game?

• How many minutes did each of your classmates study for the test?

• How many students in your class carry a cell phone?

• How many movies have your see in the theater or on television?

Multiple Choice

Which expression is equivalent to 6(x+2)?

• 6x + 12

• 6x + 2

• x + 8

• 6x + 8

Multiple Choice

Which expression is equivalent to b + b + b + b?

• 4 + b

• $$b\ \div4\$$  

• $$b^4$$  

• 4b

A dot plot uses a number line and dots to display the numerical data. ​The number of dots above each value on the number line tells you how many times that value occurs in the data set.

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Dot Plots

An interval where there is no data items.

Gap

Shows where a group of data points fall.

Cluster

Dot Plots

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The values cluster around ().

There is a gap between ()

There is another cluster around ()​

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Example from survey

Heights of 6th Grade Students

​Analysis

Sample Size: 64

Distribution: Normal (Most dots are in the middle), there is no skew.

Gaps: ​4' 2'', 4'5'' - 4'7'' and, 5'7''

Cluster: 4'8'' - 5'6''

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