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Question 4 1 pts Aresearcher is looking at the relationship between income and happiness. She collects data from a random sam
math   Statistics-And-Probability   
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Answer #1

Solution:
Given in the sample
Correlation coefficient between income and happiness analyzes the data = 0.61
So we can say that there is positive relationship between income and happiness, and both variables are moderately correalted with each other.
Coefficient of determintaion = (Correlation coefficient)^2 = (0.61)^2 = 0.3721
So we can say that only obout 37% of the variation in happiness can be explained by variation in income.
So its correct answer is D. i.e. only obout 37% of the variation in happiness can be explained by variation in income.

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