# Question

Find ht interval [ μ – z σ / √ n μ + z σ / √ n = within which 95 percent of the sample means would be expected to fall, assuming that each sample is from a normal population.

a. μ = 200, σ = 12, n = 36

b. μ = 1,000, σ = 15, n = 9

c. μ = 50, σ = 1, n = 25

a. μ = 200, σ = 12, n = 36

b. μ = 1,000, σ = 15, n = 9

c. μ = 50, σ = 1, n = 25

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