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 selected adult males and measured their heights with the resulting relative frequency distribution as shown here. Identify two major flaws with these results. Select all that apply. The classes do not allow for the possibility that an adult male could be between 144 cm and 145 cm tall, or between 159 cm and 160cm tall, and so on. All 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 then decrease. All of the relative frequencies are different. If they are from a normal distribution, they should all be exactly the same. The classes do not allow for the possibility that an adult male could be less than 130 cm tall or greater than 204 cm tall. The sum of the relative frequencies is 124%, but it should be 100%, with a small possible round-off error. The relative frequencies were recorded as percents instead of counts.

Explanation / Answer

Option-B and E

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

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