A Local Tire Dealer Wants to Predict the Number of Tires

question 139

Short Answer

A local tire dealer wants to predict the number of tires sold each month. He believes that the number of tires sold is a linear function of the amount of money invested in advertising. He randomly selects 6 months of data consisting of monthly tire sales (in thousands of tires) and monthly advertising expenditures (in thousands of dollars). The simple linear regression equation is ŷ = 3 + 1x, and the sample correlation coefficient (r²) = .6364. Test to determine if there is a significant correlation between the monthly tire sales and monthly advertising expenditures. Use H₀: ρ = 0 vs. H_A: ρ ≠ 0 at α = .05.

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Definitions:

Milgram's Experiment

A series of social psychology experiments conducted by Stanley Milgram, measuring the willingness of participants to obey an authority figure instructing them to perform acts conflicting with their personal conscience.

Obedience

Obedience is the act of following orders or instructions, typically from a figure of authority.

Psychological Distance

refers to the perception of when events occur and how distant an object is to an individual in terms of time, space, social distance, and hypotheticality.

Administration Of Shocks

A controversial method used in psychological or medical research, where electric shocks are administered to subjects under controlled conditions to study behaviors or responses.