Data Unit

Review on Data

Today we will have a review on Mean, Median, Mode, Range, IQR as well as Dot Plots, Box Plots, Histograms and Steam and Leaf diagrams.

Match

Match the following

• Range is...

• Mode is..

• Mean is..

• Median is..

the difference between the lowest and highest values.

the number which appears most often.

the average of a list of numbers.

the middle of a sorted list of numbers.

• the difference between the lowest and highest values.

• the number which appears most often.

• the average of a list of numbers.

• the middle of a sorted list of numbers.

Make sure you remember this!

• The mean is the average (add up all the values and divide by the number of values give.)

• The mode is the number found most often in a group of values.

• The median is found in the middle of a sorted list (make sure your list is in order from least to greatest.)

• The range is the difference between the highest and lowest values given.

Dropdown

What is the range of the following list?​

Select answer

Dropdown

What is the median of the following list?​​

Select answer

Dropdown

What is the mode​ of the following list?​ ​

Select answer

Dropdown

What is the mean of the following list?​​

Select answer

A Stem and Leaf Plot is a special table where each data value is split into a "stem" (the first digit or digits) and a "leaf" (usually the last digit).

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A box plot is a special type of diagram showing Quartiles 1, 2 and 3 (where the data can be split into quarters) in a box, with lines extending to the lowest and highest values, like this:

Match

Label the correct values for each of the points on the box plot provided.

• The minimum is..

• The maximum is..

• Q1 is..

• Q3 is..

• The median is..

6

14

8

11

9

• 6

• 14

• 8

• 11

• 9

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​A dot plot is a visual display of data using a number line and dots to represent each data point.

Multiple Choice

Which of the following best describe the dot plot?

• The data is clustered around 10.

• The data is peaks at 5.

• The data is skewed to the left.

• The data has gaps.

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A histogram is a chart that plots the distribution of a numeric variable’s values as a series of bars. Each bar typically covers a range of numeric values.

Multiple Choice

Describe the shape of the histogram.

• symmetrical

• skewed to the right.

• skewed to the left.

Multiple Choice

The number of students typing 45-59 WPM is four times the number of students typing 0-14 WPM.

• True

• False

Match

Match the following

• Number of students typing 30-44 WPM.

• Total number of students surveyed.

• How many more students were typing 30-44 WPM rather than 0-14 WPM?

14

49

9

• 14

• 49

• 9