Question

The following data give the number of hours 55 students spent studying and their corresponding grades...

The following data give the number of hours 55 students spent studying and their corresponding grades

Hours Studying 33 33 44 55 55
Grades 72 74 74 75 79

Step 1 of 5: Calculate the sum of squared errors (SSE). Use the values b0=66.8000 and b1=2.0000 for the calculations. Round your answer to three decimal places.

Step 2 of 5: Calculate the estimated variance of errors, s^2e. Round your answer to three decimal places.

Step 3 of 5: Calculate the estimated variance of slope, s^2b1. Round your answer to three decimal places.

Step 4 of 5: Construct the 80% confidence interval for the slope. Round your answers to three decimal places.

Step 5 of 5: Construct the 98% confidence interval for the slope. Round your answers to three decimal places.

Homework Answers

Answer #1

The statistical software output for this problem is :

Step 1 : SSE = 10.8

Step 2 : S2e = 3.6

Step 3 : S2b = 0.9

Step 4 : The 80% confidence interval for the slope is :

(0.446 , 3.554)

Step 5 : The 98% confidence interval for the slope is :

(-2.308 , 6.308)

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