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Author Question: A statistics professor gave three quizzes leading up to the first test in his class. The quiz grades ... (Read 187 times)

EAugust

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on: Feb 14, 2020

Question 1

The table below shows data for n = 20 observations.



a.Use a first-order regression model to find a least squares prediction equation for the model.
b. Find a 95% confidence interval for the coefficient of x1 in your model. Interpret the result.
c. Find a 95% confidence interval for the coefficient of x2 in your model. Interpret the result.
d. Find R2 and Ra2 and interpret these values.
e. Test the null hypothesis H0: β1 = β2 = 0 against the alternative hypothesis Ha: at least one βi ≠ 0. Use Interpret the result.

Question 2

A statistics professor gave three quizzes leading up to the first test in his class. The quiz grades and test grade for each of eight students are given in the table.



The professor fit a first-order model to the data that he intends to use to predict a student’s grade on the first test using that student’s grades on the first three quizzes.

Test the null hypothesis H0: β1 =  β2 = β3 = 0 against the alternative hypothesis Ha: at least one βi ≠ 0. Use Interpret the result.
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by EAugust on Feb 14, 2020

l.stuut

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Reply #1 on: Feb 14, 2020
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EAugust

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Reply 2 on: Feb 14, 2020
Gracias!

daiying98

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Reply 3 on: Yesterday
Excellent

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