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A census collected data on everyone that lived in a certain small town. The random variable x is the number of girls out of four
A census collected data on everyone that lived in a certain small town. The random variable is the number of girls out of four children born to a randomly selected couple in that town. Its probability distribution is shown below. Complete parts a through
table
a Find and interpret the mean of the random variable.
Round to four decimal places as needed.
Interpret the mean. Choose the correct answer below.
A The observed value of the random variable will be equal to the mean of the random variable in most observations.
B As the number of observations, decreases, the mean of the observations will approach the mean of the random variable.
C As the number of observations, increases, the mean of the observations will approach the mean of the random variable.
D The observed value of the random variable will be less than the mean of the random variable in most observations.
b Obtain the standard deviation of the random variable.
Round to four decimal places as needed.
c Draw a probability histogram for the random variable. Choose the correct graph below.
A
B
c
D
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