4. A company has recorded data on the daily demand for its product (y in thousands of units) and the unit price (x in hundreds of dollars). A sample of 15 days demand and associated prices resulted in the following data. Ex=75 Ex²=469 Ey=135 Ey² = 1315 e. Compute the standard error of the estimate. Σxy=616 f. Compute the estimated standard deviation of b₁. g. Use the t test to test the following hypothesis B₁ = 0 at a = .05. What is your conclusion?

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4.
A company has recorded data on the daily demand for its product (y in
thousands of units) and the unit price (x in hundreds of dollars). A sample of 15
days demand and associated prices resulted in the following data.
Ex=75 Ex² = 469
Ey=135 Ey² = 1315 Σxy=616
e. Compute the standard error of the estimate.
f. Compute the estimated standard deviation of b₁.
g. Use the t test to test the following hypothesis ß₁ = 0 at a = .05. What is
your conclusion?
Transcribed Image Text:4. A company has recorded data on the daily demand for its product (y in thousands of units) and the unit price (x in hundreds of dollars). A sample of 15 days demand and associated prices resulted in the following data. Ex=75 Ex² = 469 Ey=135 Ey² = 1315 Σxy=616 e. Compute the standard error of the estimate. f. Compute the estimated standard deviation of b₁. g. Use the t test to test the following hypothesis ß₁ = 0 at a = .05. What is your conclusion?
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