Mathematics: Question 1 options: It was found that 60% of people have a dog as a pet. If a random sample of 11 people is selected, what is the variance of the number of people that have a dog as a pet

Question 1 options: It was found that 60% of people

Ответ:

BustD0wnAnt

14.02.2022

Mathematics

Var= 2.64

Step-by-step explanation:

Given

$p = 60\%$ ---Proportion

n = 11 --- Sample Size

Required

Determine the variance

Variance (Var) is calculated as follows;

Var= np(1 - p)

Substitute values for n and p

$Var= 11 * 60\% * (1 - 60\%)$

Convert percentage to decimal

Var= 11 * 0.60 * (1 - 0.60)

Var= 11 * 0.60 * 0.40

Var= 2.64

Hence, the variance is 2.64

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Ответ:

Selen13

16.10.2021

Mathematics

I believe the correct answer from the choices listed above is option B. Shayla is not applying the vertical line test correctly because using the y-axis tests only whether x = 0 is mapped to multiple values. Hope this answers the question.

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Question 1 options: It was found that 60% of people have a dog as a pet. If a random sample of 11 people is selected, what is the variance of the number of people that have a dog as a pet

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