Mean or Expected Value and Standard Deviation · Exercise 4

Identify the mistake in the probability distribution table.

$$\begin{array}{ccc}\text{x}& \text{P(x)}& \text{x*P(x)}\\ \text{1}& \text{0.15}& \text{0.15}\\ \text{2}& \text{0.25}& \text{0.50}\\ \text{3}& \text{0.30}& \text{0.90}\\ \text{4}& \text{0.20}& \text{0.80}\\ \text{5}& \text{0.15}& \text{0.75}\end{array}$$

OpenStax, Introductory Statistics 2e · §4.2 Mean or Expected Value and Standard Deviation · Exercise 4