Author Question: A normal distribution has a mean of 55, and about 25% of the values are above 65. Approximately what ... (Read 70 times)

vHAUNG6011 · **on:** May 26, 2021

Question 1

Let X have density function f(x), where f(x) =

when x ≥ 1. Find the mean and standard deviation of X.
◦ μ = 1, σ = 3
◦ μ = 2, σ = 3
◦ μ = 2, σ = 2
◦ μ = 2, σ = does not exist
◦ neither the mean nor the standard deviation exist

Question 2

A normal distribution has a mean of 55, and about 25% of the values are above 65. Approximately what is the standard deviation for this distribution?
◦ 13
◦ 18
◦ 20
◦ 15
◦ 10

Carissamariew · **Reply #1 on:** May 26, 2021

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