a-researcher-collects-the-cholesterol-levels-in-mgdltextmgdl-mgdl-of-a-sample-of

Question

A researcher collects the cholesterol levels (in units of $ext{mg/dL}$ ) of a sample of adults. The data ranges from $120$ to $240$ . She considers two frequency distributions: one with a first class lower limit of $120$ and class width of $20$ , and another with class width of $10$ . Which frequency distribution is likely to provide a better summary of the cholesterol data? Explain.

Accepted Answer

The distribution with class width $20$ , because it groups the data into a reasonable number of classes and highlights overall trends.

Answer

The distribution with class width $20$ , because more classes always mean a better summary.

Answer

Both distributions are equally effective regardless of class width.

Answer

The distribution with class width $20$ is too broad and loses important details.