The Discrete Random Variable X Is the Number of Students

question 69

Multiple Choice

The discrete random variable X is the number of students that show up for Professor Smith's office hours on Monday afternoons.The table below shows the probability distribution for X.What is the expected value E(X) for this distribution?

• A)1.2
• B)1.0
• C)1.5
• D)2.0

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Definitions:

For Each

A loop construct in programming languages that iterates over elements of a collection or array, processing each element in turn.

Iterate

To repeat a process or cycle in programming, often used with loops to perform an operation on a collection of items.

Sorting Algorithm

A method or process of arranging the elements of a list or array in a certain order, typically in numerical or lexicographical order.

Selection Sort

A simple comparison-based sorting algorithm that divides the input list into two parts: the sorted part at the beginning and the unsorted part that occupies the rest of the list, repeatedly selecting the smallest or largest element from the unsorted section and moving it to the end of the sorted section.