Discussion:
Q1. Use the following information to construct the confidence intervals specified to estimate µ
a) 95% confidence; = 25, σ2 = 12.25, and n = 60.
b) 98% confidence; = 119.6, S2 = 570.7321, and n = 75.
c) 90% confidence; ∑X = 1814.4, σ2 = 0.948676, and n = 32.
Q2. A sample of size n = 10 is randomly selected from a normal population with mean µ = 52 and variance σ2 = 22.5. The sample value is calculated.
d) find P(X‾> 55)
e) find P(50 ≤ X‾≤ 60)
f) find P(X‾≤ 55)