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A random sample of 36 world‐ranked chess players provides the following sample statistics, where the bar over the variable represents the sample means and where s denotes the sample standard deviations:Number of hours of study per day: 𝑋̅ = 6.2, 𝑠x = 1.3Yearly winnings: 𝑌̅ = $208,000, 𝑠y = $42,000Correlation: 𝑟xy = 0.15Consider the information given above for Question 18 once again. The proportion of the variance in yearly winnings explained by the variance in the number of hours of study per day is approximately:
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