(a) Verify that Ex = 193.8, Ey = 178.9, Ex? = 7700.26, Ey? = 6536.81, Exy = 7088.36, and r= 0.964. Ex Ey Ex Exy (b) Use a 10% level of significance to test the claim that p > 0. (Use 2 decimal places.) critical e Conclusion O Reject the null hypothesis, there is sufficient evidence that p > 0. O Reject the null hypothesis, there is insufficient evidence that p> 0. O Fail to reject the null hypothesis, there is insufficient evidence that p> 0. O Fall to reject the null hypothesis, there is sufficient evidence that p> 0. (c) Verify that S, = 1.7964, a = 4.0858, and b= 0.8177. Se al b (d) Find the predicted dealer invoice when the list price is x = 44 (thousand dollars). (Use 2 decimal places.) (e) Find a 95% confidence interval for y when x = 44 (thousand dollars). (Use 2 decimal place.) lower limit upper limit (f) Use a 10% level of significance to test the claim that > 0. (Use 2 decimal places.) critical t Conclusion O Reject the null hypothesis, there is sufficient evidence that > 0. O Reject the null hypothesis, there is insufficient evidence that 6> 0. O Fail to reject the null hypothesis, there is insufficient evidence that > 0. O Fail to reject the null hypothesis, there is sufficient evidence that p> 0.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Question
Suppose you are interested in buying a new Lincoln Navigator or Town Car. You are standing on the sales lot looking at a model with different options. The list price is on the vehicle. As a salesperson approaches, you wonder what the dealer invoice price is for this model with
its options. The following data are based on a random selection of these cars of different models and options. Let y be the dealer invoice (in thousands of dollars) for the given vehicle.
31.4
34.5
36.1
44.0
47.8
у
31.0
31.6
32.0
42.1
42.2
(a) Verify that Ex = 193.8, Ey = 178.9, Ex²
Σχ
7700.26, Ey2 = 6536.81, Exy = 7088.36, and r = 0.964.
ΣΥ
Ex²|
Ey²|
Σχy
(b) Use a 10% level of significance to test the claim thatp > 0. (Use 2 decimal places.)
critical t
Conclusion
O Reject the null hypothesis, there is sufficient evidence that p > 0.
O Reject the null hypothesis, there is insufficient evidence that p > 0.
Fail to reject the null hypothesis, there is insufficient evidence that p > 0.
O Fail to reject the null hypothesis, there is sufficient evidence that p > 0.
(c) Verify that Se - 1.7964, a - 4.0858, and b - 0.8177.
Se
a
(d) Find the predicted dealer invoice when the list price is x = 44 (thousand dollars). (Use 2 decimal places.)
(e) Find a 95% confidence interval for y when x = 44 (thousand dollars). (Use 2 decimal place.)
lower limit
upper limit
(f) Use a 10% level of significance to test the claim that ß > 0. (Use 2 decimal places.)
critical t
Conclusion
O Reject the null hypothesis, there is sufficient evidence that ß > 0.
O Reject the null hypothesis, there is insufficient evidence that ß > 0.
Fail to reject the null hypothesis, there is insufficient evidence that ß > 0.
O Fail to reject the null hypothesis, there is sufficient evidence that B > 0.
Transcribed Image Text:Suppose you are interested in buying a new Lincoln Navigator or Town Car. You are standing on the sales lot looking at a model with different options. The list price is on the vehicle. As a salesperson approaches, you wonder what the dealer invoice price is for this model with its options. The following data are based on a random selection of these cars of different models and options. Let y be the dealer invoice (in thousands of dollars) for the given vehicle. 31.4 34.5 36.1 44.0 47.8 у 31.0 31.6 32.0 42.1 42.2 (a) Verify that Ex = 193.8, Ey = 178.9, Ex² Σχ 7700.26, Ey2 = 6536.81, Exy = 7088.36, and r = 0.964. ΣΥ Ex²| Ey²| Σχy (b) Use a 10% level of significance to test the claim thatp > 0. (Use 2 decimal places.) critical t Conclusion O Reject the null hypothesis, there is sufficient evidence that p > 0. O Reject the null hypothesis, there is insufficient evidence that p > 0. Fail to reject the null hypothesis, there is insufficient evidence that p > 0. O Fail to reject the null hypothesis, there is sufficient evidence that p > 0. (c) Verify that Se - 1.7964, a - 4.0858, and b - 0.8177. Se a (d) Find the predicted dealer invoice when the list price is x = 44 (thousand dollars). (Use 2 decimal places.) (e) Find a 95% confidence interval for y when x = 44 (thousand dollars). (Use 2 decimal place.) lower limit upper limit (f) Use a 10% level of significance to test the claim that ß > 0. (Use 2 decimal places.) critical t Conclusion O Reject the null hypothesis, there is sufficient evidence that ß > 0. O Reject the null hypothesis, there is insufficient evidence that ß > 0. Fail to reject the null hypothesis, there is insufficient evidence that ß > 0. O Fail to reject the null hypothesis, there is sufficient evidence that B > 0.
(g) Find a 95% confidence interval for ß and interpret its meaning. (Use 3 decimal places.)
lower limit
upper limit
Interpretation
O For every $1,000 increase in list price, the dealer price decreases by an amount that falls within the confidence interval.
O For every $1,000 increase in list price, the dealer price decreases by an amount that falls outside the confidence interval.
O For every $1,000 increase in list price, the dealer price increases by an amount that falls outside the confidence interval.
O For every $1,000 increase in list price, the dealer price increases by an amount that falls within the confidence interval.
Transcribed Image Text:(g) Find a 95% confidence interval for ß and interpret its meaning. (Use 3 decimal places.) lower limit upper limit Interpretation O For every $1,000 increase in list price, the dealer price decreases by an amount that falls within the confidence interval. O For every $1,000 increase in list price, the dealer price decreases by an amount that falls outside the confidence interval. O For every $1,000 increase in list price, the dealer price increases by an amount that falls outside the confidence interval. O For every $1,000 increase in list price, the dealer price increases by an amount that falls within the confidence interval.
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