Find the variance of x or the number of cups of coffee.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter0: Preparing For Algebra
Section0.11: Simple Probability And Odds
Problem 3E
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Find the variance of x or the number of cups of coffee. (Do not round intermediate steps but round your final answer to 4 decimal places)

Exhibit: Coffee Consumption.
A sample of 2,500 people was asked how many cups of coffee they drink in the morning. Let's
think of the number of coffee cups as a random variable x. You are given the following
distribution of x (or coffee lovers) based on the sample information:
Cups of Coffee (x)
Probability
0.14
1
0.4
0.31
3
0.11
4
0.04
Transcribed Image Text:Exhibit: Coffee Consumption. A sample of 2,500 people was asked how many cups of coffee they drink in the morning. Let's think of the number of coffee cups as a random variable x. You are given the following distribution of x (or coffee lovers) based on the sample information: Cups of Coffee (x) Probability 0.14 1 0.4 0.31 3 0.11 4 0.04
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