Author Question: A probability distribution with an expected value greater than the expected value of a second ... (Read 82 times)

erika · **on:** Jun 24, 2018

A probability distribution with an expected value greater than the expected value of a second probability distribution will also have a higher standard deviation.

Indicate whether the statement is true or false

Question 2

The St. Joe Company grows pine trees and the average annual increase in tree diameter is 3.1 inches with a standard deviation of 0.5 inch.

A random sample of n = 50 trees is collected. What is the probability of the sample mean being less the 2.9 inches?
A) 0.4977
B) 0.0023
C) 0.9977
D) 0.9954