Can I have help with 1-3 Take Home Exam 7.pdf X Secure h ps://ttu.blackboard.com

Question

Can I have help with 1-3

Take Home Exam 7.pdf X Secure h ps://ttu.blackboard.com bbcswebdav/pid-2573504-dt-conten rid-13654930 1 /courses MATH-2345-D01/Take %20Home%20Exam%2007.pdf Take Home Exam 7.pdf Select the best answer for each question below. All 3 problems have multiple questions. You get 10 points for each correct answer. l(q1-q50. Given are five observations collected in a regression study on two variables xand y 18 1. Calculate the slope of thelinear regression equation for the variables x and y: A) 0.9 B) 7.6 C) 0.9 D) 7.6 2. Calculate the intercept of the linear regression equation for the variables x and y: A) 7.6 B) 0.9 C) 7.6 D) 0.9 3. The estimated regression equation for the two variables is: 0.9 7.6x B) 7.6 +0.9x C). -0.9+ 7.6x DO 7.6-0.9x 4. What does the slope tell you about the relationship between x and y: A) There is a negative relationship between x and y. B) There is no relationship betweenxand y. C) There is a positive relationship between x and y. 5. Which is the predicted value of ywhen 10? C) 6.7 D) 6.6 76.9 q6-q7). The estimated regression equation for a sample is 0.2 2.6x with SSE-12.4 and SST-80. 6. Which is the coefficient of determination for the regression equation? A) 0.84 D) 0.95 B) 0.76 C) 0.98 7. Which is the correlation coefficient? Ask me anything 4/11/2017

Explanation / Answer

1) slope, b1 = [ (xi - xi)(yi - i) ] / [ (xi - xi)2] = 171/190 = 0.9 (option c)

2) intercept b0 = i - b1 * xi = 16.6 - 0.9*10 = 7.6 (option a)

3) = intercept + slope * x = 7.6 + 0.9x (option b)

xi yi xi - xi yi - i (xi - xi)2 (xi - xi)(yi - i) 2 7 -8 -9.6 64 76.8 6 18 -4 1.4 16 -5.6 9 9 -1 -7.6 1 7.6 13 26 3 9.4 9 28.2 20 23 10 6.4 100 64 Total 50 83 190 171 Mean 10 16.6

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.