Data and Statistics practice test #1

Select all of the Statistical Questions below. (Remember, it must have a numerical answer, and the answers must vary.)

• How many sports do 6th graders play?

• How many inches are in a foot?

• What is the average size of 6th graders' bedrooms (in square feet)

• How many nickels are in a dollar?

Here is the height of 20 flowers in the school garden in centimeters:

5, 5, 10, 10, 15, 25, 25, 25, 25, 30, 30, 35, 45, 45, 50, 55, 65, 70, 105, 110

Which Histogram accurately displays this data?

• 
• 
• 
• 

Which of the following is NOT true about this histogram?

• Seventeen students took this survey.

• Eight students spend up to 5 hours doing homework each week.

• Most people spent 10 hours doing homework

• Five students spent 5-10 hours doing homework each week.

This dot plot shows the number of hours of sleep 20 6th graders got one night at Outdoor Lab. What is the outlier in this graph?

• 8

• 8.5

• 4

• 6

Here are the number of hours Natalie slept each night this week. What is the MEAN (average) number of hours Natalie slept?

9, 7.5, 8.5, 8, 9, 7, 9

(hint - use a calculator to help)

• 7

• 7.29

• 8

• 5.5

Here are the number of hours Natalie slept each night this week. What is the MODE?

9, 7.5, 8.5, 8, 9, 7, 9

(hint: put them in order from least to greatest)

• 8

• 9

• 7.5

• 7

Here are the number of hours Natalie slept each night this week. What is the Median number of hours Natalie slept?

9, 7.5, 8.5, 8, 9, 7, 9

(hint: put them in order from least to greatest)

• 6

• 8.5

• 2

• 9

How would you describe the shape of this data?

• skewed left

• skewed right

• flat

• symmetrical

How can outliers change your data?

• Bring the average (mean) up or down

• Make it prettier

• Make it taller

• Change from green to pink

How do you find the MEAN (average) of a data set?

• Close your eyes and point!

• Choose your favorite number

• Add all data points, then divide by the number of numbers you added.

• Find the one in the middle