Making Inferences from Data Tables

Which data set shows students who tend to spend more time on homework per week?

• Finn's Data Set

• Jonah's Data Set

The following dot plots show the amount of time it takes each​ person, in a random​ sample, to complete two similar problems. Make a comparative inference about the two problems.

• The problems are equally challenging.

• Problem 2 is more difficult because it took students longer on average.

• Problem 1 is more difficult because it took students longer on average.

The following shows the number of calls two radio shows get each day for a ten day period. The two shows are on at the same time. Make a comparative inference based on the median values.

• Show 1 usually receives more calls.

• Show 2 usually receives more calls.

• The shows usually receive equal numbers of calls.

• There is not enough data to draw an inference.

A random survey of 7th graders finds that 7 out of 10 have more than 1 hour of screen time each day. If there are 110 7th graders in your school, how many would you expect to have more than 1 hour of screen time?

• 77

• 70

• 75

• 81

Calculate mean from the given frequency table.

• 7

• 8

• 9

• 10

Find the mean from the following table...

You may need to copy the table out and add columns...

• 13

• 14

• 13.3

• 14.2

Find the mean from the following table...

You may need to copy the table out and add columns...

• 11.24

• 10.54

• 11.84

• 10.56

Find the mean number of phones. You may need to copy the table out and add columns...

• 2.56

• 2.3

• 1.5

• 2.2

Find the mean number of pets. You may need to copy out the table with an extra column.

• 0.87

• 1.55

• 1.68

• 1.45

Find the mean amount of money. You may need to copy out the table with an extra column.

• £12

• £24

• £30

• £35