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.
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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