Heights of adult males are known to have a normal distribution. A researcher cla

Question

Heights of adult males are known to have a normal distribution. A researcher claims to have randomly selectedHeight (cm) adult males and measured their heights with the resulting relative frequency distribution as shown here. Identify two major flaws with these results. Relative Frequency 24% 25% 21% 27% 28% 130-144 160-174 176-1891 190-204 | Select all that apply A of the relative frequencies appear to be roughly the same. If they are from a normal distribution, they should start low, reach a maximum, and A decrease. en B The classes do not allow for the possibility that an adult male could be between 144 and 145 cm tall, or between 159 crm and 160 cm tall and so on. C. All of the relative frequencies are different. If they are from a normal distribution, they should all be exactly the same. D. The relative frequencies were recorded as percents instead of counts. E. The sum of the relative frequencies is 125%, but it should be 100%, with a small possible round-off error. F. The classes do not allow for the possibility that an adult male could be less than 130 tal or greater than 204 cm tall.

Explanation / Answer

Ans:

Options A and E are correct.

All of the relative frequencies appear to be roughly the same.if they are form a normal distribution,they should start low,reach a maximum, and then decrease.

The sum of the relative frequencies is 125%,but it should be 100%,with a small possible round off error.

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