Question

The scatter plot shows temperatures, taken at the same time but at different elevations on a mountain. Temperatures are measured to the nearest degree Fahrenheit, and elevation is measured to the nearest 10 meters.

At what range of elevations do you find clusters?

What is the approximate range of temperatures at these elevations?

A. A cluster from 30 m -40 m with a range from 52°F-65°F

B. A cluster from 50 m - 270 m with a range from 31° F - 45° F

C. A cluster from 70 m - 160 m with a range from 31°F - 54°F;
A cluster from 200 m - 310 m with a range from 32°F - 33°F

D. A cluster from 30 m - 80 m with a range from 52°F - 65°F;
A cluster from 300 m - 350 m with a range from 18°F - 27°F

Answer 1

A cluster is a group of data that is concentrated in a known range.

In the scatter plot we can see that there is a cluster at elevations between 30 meters and 80 meters.

To this interval of elevations corresponds the interval of temperatures that goes from 52 °F to 65 °F.

NOTE: If there is more than one cluster, we can add a cluster from 300 m - 350 m with a range from 18°F - 27°F, but has less points than the 30-60 m cluster.

Answer:

D. A cluster from 30 m - 80 m with a range from 52°F - 65°F