Question

DRP test scores There are many ways to measure the reading ability of children. One frequently used test is the Degree of Reading Power (DRP). In a research study on third grade students, the DRP was administered to 44 students. Their scores were as follows.

Make a histogram to display the data. Write a few sentences describing the distribution of DRP scores.

Short answer

Because the highest bar is roughly in the middle of the histogram, the shape is roughly symmetric.

Because the center of a symmetric distribution is roughly in the middle of the histogram, the center is roughly at 35.

Speed: between 10 and 55 miles per hour

Outlier: No, because the histogram's bars are all adjacent.

Step-by-step solution

Given information. 

The DRP was administered to 44 third-grade students in a research study. Their results are as follows.

Step 2. Create a histogram to represent the data.

The first bar begins at 10 and ends at 15, and each subsequent bar has the same width of 5.

The height of the bars must equal the frequency of the class (number of values within the interval)

Because the highest bar is roughly in the middle of the histogram, the shape is roughly symmetric.

Because the center of a symmetric distribution is roughly in the middle of the histogram, the center is roughly at 35.

Speed: between 10 and 55 miles per hour

Outlier: No, because the histogram's bars are all adjacent.