Making Inferences About Data

In an effort to try to convince her mother that she is too old to join the intermediate swim​ class, Mira, who is 13 years​ old, gathers data on the ages of a random sample of members of the current intermediate swim class. The results of the data collected by Mira are displayed in the dot plot shown.

• It is likely that she will be able to convince her mother.​ Mira's age is within the area where the data are clustered.

• It is likely that she will be able to convince her mother.​ Mira's age is to the left of the area where the data are clustered.

• It is unlikely that she will be able to convince her mother.​ Mira's age is within the area where the data are clustered.

• It is unlikely that she will be able to convince her mother.​ Mira's age is to the left of the area where the data are clustered.

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

A valid sample shows that 3 of 20 players win at a carnival game. If 275 people play the game each day, how many winners would you expect to have?

• about 50

• about 45

• about 41

• about 36

How many people have two or less books in their desk?

• 4

• 5

• 6

• 7

There are two types of plants in a greenhouse. The following dot plots show the heights of 20​ plants, 10 of Type 1 and 10 of Type 2. The plants are given the same amount of food and water and grow at the same rate. What is an inference that can be made from the means?

• Type 2 is typically taller.

• Type 1 is typically taller.

• The types are typically the same height.

What is the range of data set?

• 5

• 7

• 4

Based on the histograms, which is a true statement?

• DX Comics bring in more money on average.

• Marble Comics bring in more money on average.

• All Marble movies bring in more money than all DX movies.

• The amount earned by DX movies varies much more than the amount earned by Marble Movies.

Based on the histograms, which is a true statement?

• Some DX Comics movies made more than some Marble Comics Movies.

• The DX Comics movie with the greatest revenue made more than the Marble Comics movie with the greatest revenue.

• All Marble Comics movies made more money than every DX Comics movies.

Based on the Histograms, which statement is correct?

• The DX Comics movie with the greatest revenue made more than the Marble Comics movie with the greatest revenue.

• DX Comics made more movies with revenue in the $300,000-400,000 range than Marble Comics did.

• The Marble Comics movie with the greatest revenue made more than the DX Comics movie with the greatest revenue.