1. Identifying Discrete and Continuous Random Variables. In Exercise 6, identify the given values as a discrete random variable, continuous random variable, or not a random variable.
a. Eye colors of humans on commercial aircraft flights
b. Weights of humans on commercial aircraft flights
c. Numbers of passengers on commercial aircraft flights
d. Numbers of randomly generated digits before getting the digit 3
e. Political party affiliations of adults in the United States
f. Exact costs of presidential campaigns
2. Identifying Probability Distributions, determine whether a probability distribution is given. If a probability distribution is given, find its mean and standard deviation. If a probability distribution is not given, identify the requirements that are not satisfied.
Male Color Blindness: When conducting research on color blindness in males. A researcher forms random groups with five males in each group. The random variable x is the number of males in the group who have a form of color blindness (based on data from the National Institutes of Health).

3. Genetics, In Exercises, refer to the accompanying table, which describes results from groups of 10 births from 10 different sets of parents. The random variable x represents the number of girls among 10 children.
Using Probabilities for Unusual Events
a. Find the probability of getting exactly 1 girl in 10 births.
b. Find the probability of getting 1 or fewer girls in 10 births.
c. Which probability is relevant for determining whether 1 is an unusually low number of girls in 10 births: the result from part (a) or part (b)?
d. Is 1 an unusually low number of girls in 10 births? Why or why not?

Transcribed Image Text:

P(x) х 0.659 0.287 0.050 0.004 4 0.001 5 0+ 3. Number P(x) of Girls x 0.001 0.010 0.044 0.117 4 0.205 0.246 0.205 0.117 0.044 0.010 10 0.001 2. 3. 00