Question

Height range to frequency

55-59 to 4
60-64 to 9
65-69 to 8
70-74 to 4


A statistician collects the following height data in inches for a school district. The statistician says that it is a normal distribution. How did they draw this conclusion?

(1 point)
Responses

The frequencies for the first and last height range are the same.
The frequencies for the first and last height range are the same.

The frequencies for each height range are different.
The frequencies for each height range are different.

When graphed, the data creates a bell curve.
When graphed, the data creates a bell curve.

When graphed, the data creates a straight line.
When graphed, the data creates a straight line.

Answer 1

When graphed, the data creates a bell curve.

(You can see this because the frequencies rise to a peak in the middle ranges (9, 8) and fall symmetrically at the ends (4, 4), which is characteristic of a normal distribution.)