Math Problem Statement
The number of minutes, rounded to the nearest whole minute, a randomly selected customer spends viewing his account information on a secure web page is described by the probability distribution for the discrete random variable X; described by the table shown here. What is the approximate value of the standard deviation of X or namely σ?
Solution
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Math Problem Analysis
Mathematical Concepts
Probability
Standard Deviation
Expected Value
Formulas
σ = √(E[X²] - (E[X])²)
E[X] = Σ[X * P(X)]
Theorems
Properties of Variance and Standard Deviation
Suitable Grade Level
Grades 9-12
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