2. A used car depot wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 9 cars sold at the depot during the last 3 months.
Age (Years) 2.5 4 5.5 7 6 10 8 4 3
Selling Price (P000) 400 300 250 190 280 120 170 320 350
Determine the coefficient of correlation using Spearman Rank Correlation and test the significance at 0.01.
a. State the hypotheses
b. What is the level of significance?
c. Determine the critical region. Df_______ tcritical value_______________
d. Complete the table and compute for the value of the π and π‘β test.
Car X Y Rx Ry D π«π
1
2
e. Decision Rule
f. Conclusion
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