# Module 9 Homework Assignment The paired data below consists of test scores

Module 9 Homework Assignment

The paired data below consists of test scores and hours of preparation for 5 randomly selected students.

x Hours of preparation 5 2 9 6 10

y Test score 64 48 72 73 80

1. Use the given data and MS Excel and find the correlation coefficient r, regression equation and scatter plot.

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2. Based on the linear correlation coefficient r, and = 0.05, is this a good model? Explain.

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3. What is the best predicted test score for a student who spent 7 hours preparing for the test?

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4. Find the standard error . Use the formula or Microsoft Excel Regression

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5. Find the 99% prediction interval for the test score of a person who spent 7 hours preparing for the test given that E = 34.677. Interpret the result.

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6. Find the explained variation.

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7. Find the unexplained variation.

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8. Find the total variation.

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9. Find the value of r2 and explain its meaning.

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