Suppose Ms. Carr is interested in the relationship between her students\' 9th gr

Question

Suppose Ms. Carr is interested in the relationship between her students' 9th grade math final exam scores and the number of 120 hours they spent studying during the year. She collects information for 15 ninth grade students and uses it to obtain the regression 100 equation, where x is the number of hours spent studying during the year and y is the predicted final exam score 80 60 40 20 y 1.48x + 75.64 10 15 20 25 30 35 The scatter plot displays her results Study time in hours What is the predicted y-value when a student spends 15 hours studying? Round your answer to one decimal place

Explanation / Answer

solution:-
the line is y = 1.48 * x + 75.64
the predicted y value when a student spends 15 hours is
=> y^ = 1.48 * 15 + 75.64
=> y^ = 97.8

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