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Chapter 6: Q. 3.1 (page 393)

Refer to the previous Check Your Understanding (page 390 ) about Mrs. Desai's special multiple-choice quiz on binomial distributions. We defined X=the number of Patti's correct guesses.

1. Find μX. Interpret this value in context.

Short Answer

Expert verified

The value of meanμXis 2.

Step by step solution

01

Given Information 

Number of questions=10

Students are supposed to guess the answers.

Xis a number of answers that Patti gives correct.

Probability of success(p)=0.2

02

Explanation 

Compute the mean using binomial distribution is:

μ=n×p

Calculation:

The mean of Xcan be calculated as,

localid="1649854975780" μX=n×p=10×0.2=2.

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