Question

Question Hei Heights of aduilt males are known to have a norma 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 resulits Relative Height (cm) F 23% 4% 130-144 145-159 160-174 2196 175-189 1. 16% - 190-204 Select all that apply A All of the relative frequencies appear to be roughly the same. If they are from a normal distribution B. All of the relative frequencies If they are from a normal distribution, they should start low, reach a maximum, and then decrease. are different If they are from a normal distribution, they should all be exactly the same. dlasses do not allow for the possiblity that an adult male could be between 144 cm and 145 cm tall or between 159 cm and 160 cm tall, and so The classes do not alow for the possiblity that an adult male could be less than 130 cm, tall or greater than 204 cm tali The relative frequencies were recorded as percents instead of counts. The ium of te relative frequencies is 121%, but it should be 100%, with a smal possi le round-off error □D. □ E. F.

Answer 1

Solution:

Relative frequencies=23%=0.23

Relative frequencies=1

sum of relative frequencies=

23+24+21+26+27=121%

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

the relative frequencies were recorded as percents instead of counts

the sum of the relative frequencies is 121% but is should be 100% with a small possible round of error.

MARK OPTIONS

A

E

F