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Short answer
Consider the following set of numbers: 22, 26, 30, 27, 25, 10 What is the variance (σ2) for this population of six numbers? Type a numerical answer below. Please provide two decimal places in your answer.
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Step-by-Step Analysis
The task is to compute the population variance (σ^2) for the given six numbers: 22, 26, 30, 27, 25, 10.
First, find the mean (average) of the data set. Sum = 22 + 26 + 30 + 27 + 25 + 10 = 140. The mean is 140 div......Login to view full explanationLog in for full answers
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Which of the following statements about population variance is TRUE?
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Tesla (a car company) is developing a new vehicle that is very expensive. The marketing team is working on how to advertise this niche product to their market. Since the car is so expensive, their population is very small so they are able to interview all people in the population. The team is interested in the age of the users that may potentially buy the product. Let Y be the ages of the person being interviewed. The data is below Y = {40, 50, 56, 41, 28, 39, 66, 47} What is the variance of Y? (Note: you must use the formula in Ch 1 of the Text, or in the "Population & Sample Introduction" Video) Submit your answer as a number rounded to 3 decimals. So 540.12357 would be input as 540.124
Tesla (a car company) is developing a new vehicle that is very expensive. The marketing team is working on how to advertise this niche product to their market. Since the car is so expensive, their population is very small so they are able to interview all people in the population. The team is interested in whether the end user will buy the product or not. Let Y be an indicator variable, indicating whether or not the person would purchase the car. If Y=1 then the person said "Yes, they would purchase the car", and if Y=0 then they would "Not purchase the car". The data is below Y = {1, 1, 1, 1, 0, 1, 1, 1, 1} What is the variance of Y? (Note: you must use the formula in Ch 1 of the Text, or in the "Population & Sample Introduction" Video) Submit your answer as a number rounded to 3 decimals. So 40.12357 would be input as 40.124
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