Concept explainers
(a)
The mean number of credit cards based on the raw data.
(b)
The standard deviation number of credit cards based on the raw data.
(c)
The probability distribution for the random variable X .
(d)
To draw: The probability plot.
To identify: The shape of the distribution.
(e)
The mean number of credit cards from the probability distribution found in part (c).
The standard deviation number of credit cards from the probability distribution found in part (c).
(f)
The probability of randomly selecting an individual whose number of credit cards is more than two standard deviations from the mean.
Whether the probability is unusual.
(g)
The probability of randomly selecting two individuals who are issued exactly 2 credit cards.
To interpret: The result.
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