Sigma Notation Hwk assignment - the scenario for the X...

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Homework Instructions Assignment Due: Feb. 21 A. Read Section 12.2 in your textbook. Use the data set on page 494 in Table 12.2 (College Student Weekly Earnings) to calculate the following: 1. ∑X and ∑X 2 2. ∑Y and ∑Y 2 3. ∑XY 4. SS XX & SS YY & SS XY B. Repeat part A, but now use the data set on page 494 in Table 12.3 (Phone Hold Times) to complete the calculated values. Homework Instructions Assignment Due: Feb. 24 Building on the assignment due on Weds (Oct 9), please do the following for Problem 12.2 and Problem 12.3.
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1. Calculate b 1 the estimated slope coefficient. 2. Calculate b 0 the estimated y-intercept. 3. Write the estimated linear equation for each situation. Please use names specific to
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Unformatted text preview: the scenario for the X variable and the Y variable. 4. Interpret the estimated slope coefficient in each situation. Use the data in problem 11.5 (page 450). You are not expected to test anything, just compute all the items listed below. For each plant, A, B, and C, calculate: 1. the sum of the observations ∑ X 2. the sum of the squared observations ∑ X 2 3. the mean for each plant (X bar) 4. the overall mean of the 15 observations (ignoring which plant it came from) 5. the sum of the squared deviations around the mean ∑ ( X minus X bar) 2 6. the numerator of the ratio under the radical in formula 4.12 (the two sum formula) in chapter 4 of your text...
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