Question
Color-blindness is any abnormality of the color vision system that causes a person to see colors differently than most people or to have difficulty distinguishing
Color-blindness is any abnormality of the color vision system that causes a person to see colors differently than most people or to have difficulty distinguishing among certain colors
Color-blindness is gender-based, with the majority of sufferers being males.
Roughly 8% of white males have some form of color-blindness, while the incidence among white females is only 1%.
A random sample of 20 white males and 40 white females was chosen.
LetXbe the number of males (out of the 20) who are color-blind.
LetYbe the number of females (out of the 40) who are color-blind.
LetZbe the total number of color-blind individuals in the sample (males and females together).
Which of the following is true regarding the random variables X and Y?
a. Both X and Y can be well-approximated by normal random variables.
b. Only X can be well-approximated by a normal random variable.
c. Only Y can be well-approximated by a normal random variable.
d. Neither X nor Y can be well-approximated by a normal random variable.
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