Answer to Question #339669 in Statistics and Probability for John

Question

A study was conducted to determine whether there exists a relationship between the length of time (in hours) a senior high school student spends reviewing his or her lesson a week before the final examination and his or her grade in statistics and probability. Eight randomly selected senior high school students provided the following data.

x 10 12 24 20 13 13 8 22

y 80 83 94 90 85 84 80 89

Find the slope (a) and y-intercept (b) of the regression line. Interpret the results.

Predict the grade of a student who reviewed 15 hours a week before the final examination in statistics and probability.

Compute the Pearson’s r. Interpret the results.

Does the length of time (in hours) a senior high school student spends reviewing his or her lesson a week before final examination have significant effect to his or her grade in statistics and probability? Used 0.05 level of significance.

Answer 1

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