a-researcher-claims-that-the-distribution-of-adult-heights-in-a-population-is-no

Question

A researcher claims that the distribution of adult heights in a population is normally distributed. To test this claim, a sample of $150$ adults is taken, and their heights (in inches) are grouped into the following class intervals:

Use $alpha equals 0.05$ to test the claim that the heights are normally distributed if $chi squared equals 3.72$ .

Use $alpha equals 0.05$ to test the claim that the heights are normally distributed if $chi squared equals 3.72$ .

Accepted Answer

There is insufficient evidence to say heights deviate from a normal distribution.

Answer

The test is inconclusive.

Answer

There is sufficient evidence that adult heights do not follow a uniform distribution.

Answer

The chi-square test is invalid because the frequencies are not equal across intervals.