Suppose a simple random sample of size nequals=6464 is obtained from a population with mu equals 84μ=84 and sigma equals 16σ=16. (a) describe the sampling distribution of x overbarx. (b) what is upper p (x overbar greater than 87.6 )p x> 87.6? (c) what is upper p (x overbar less than or equals 79.2 )p x≤79.2? (d) what is upper p (81.3 less than x overbar less than 87.6 )p 81.3

a. is distributed

b.

c.

d.

Step-by-step explanation:

a.

The central limit theorem states that, for large n, the sampling distribution of the sample mean is approximately normal with mean and variance , then, the sample mean is distributed as a normal random variable with means and variance .

b.

c.

d.

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step-by-step explanation:

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