Mean and standard deviation of the population

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A CNBC study in 2017 determined only 35% of adults have zero to only a couple of hundred dollars in a savings account. With n = 4 and p = 0.26, using the binomial probability distribution, what is the mean and the standard deviation of the population? Hint: σ = square root (np(1 - p))

-4 and 0.76 respectively
-1.04 and 0.8773 respectively
-2 and 1.28 respectively
-3.36 and 0.7696 respectively

Reference no: EM132896721

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