Let X1, . . ., Xn be a random sample from an N(, 2), where the value

Question:

Let X1, . . ., Xn be a random sample from an N(μ, σ2), where the value of σ2 is unknown.
(a) Construct a (1 – α) 100% confidence interval for σ2, choosing an appropriate pivot. Interpret its meaning.
(b) Suppose a random sample from a normal gives the following summary statistics: n = 21, = 44.3, and s = 3.96. Using part (a), find a 90% confidence interval for σ2. Interpret its meaning. Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...