A random sample is to be selected from a population that has a proportion of successes

p = 0.61.

Determine the mean and standard deviation of the sampling distribution of p for each of the following sample sizes. (Round your standard deviations to four decimal places.)

(a)

n = 30

meanstandard deviation

(b)

n = 40

meanstandard deviation

(c)

n = 50

meanstandard deviation

(d)

n = 70

meanstandard deviation

(e)

n = 120

meanstandard deviation

(f)

n = 220

meanstandard deviation