If all the mass points of a random variable are increased by 10, which of the following is TRUE? Group of answer choices The expected value of X is increased by 10 and its variance is also increased by 10. The expected value of X remains constant but its variance is also increased by 10. The expected value of X is increased by 10 and its variance is multiplied by 5. The expected value of X is increased by 10 but its variance remains constant.
If all the mass points of a random variable are increased by 10, which of the following is TRUE? Group of answer choices The expected value of X is increased by 10 and its variance is also increased by 10. The expected value of X remains constant but its variance is also increased by 10. The expected value of X is increased by 10 and its variance is multiplied by 5. The expected value of X is increased by 10 but its variance remains constant.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Question
If all the mass points of a random variable are increased by 10, which of the following is TRUE?
Group of answer choices
The expected value of X is increased by 10 and its variance is also increased by 10.
The expected value of X remains constant but its variance is also increased by 10.
The expected value of X is increased by 10 and its variance is multiplied by 5.
The expected value of X is increased by 10 but its variance remains constant.
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