2 of 9 (1 complete) Heights of adult males are known to have a normal distributi

Question

2 of 9 (1 complete) Heights of adult males are known to have a normal distribution. A researcher claims to have randomly selected adult males and mneasured their heights with the resulting relative frequency distribution as shown here. Identify two major flaws with these results. Relative ) Frequency D Height (cm -130-144-T- 145-159 160-174 175-189 190-204 2396 22% 26% 27% o Select all that apply The sum of the relative frequencies is 122%, but it should be 100%, with a small possible round-off error OB. The classes do not allow for the possibility that an adult male could be between 144 cm and 145 cm tall. C. All of the relative frequencies appear to be roughly the same. If they are from a normal distribution, they A. decrease. D. All of the relative frequencies are different If they are from a normal distribution, they should all be exacty F. The classes do not allow for the possibility that an adult male could be less than 130 cm tall or greater thar E. The relative frequencies were recorded as percents instead of counts 18

Explanation / Answer

Ans:

Option A and C are correct.

The sum of the relative frequecies is 122%,but it should be 100%,with a small possible round off error.

All of the relative frequencies appear to be roughly the same.If they are from anormal distribution,they should decrease

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