A Local Tire Dealer Wants to Predict the Number of Tires

question 23

Essay

A local tire dealer wants to predict the number of tires sold each month.The dealer believes that the number of tires sold is a linear function of the amount of money invested in advertising.The dealer 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 $\hat { y }$
= 3 + 1x and 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:r = 0 vs.H_A:r ¹ 0 at a = .05.
Failed to reject H₀,and there is no significant correlation.

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Definitions:

Racial Superiority

The belief that a particular race possesses qualities or abilities that make it superior to other races.

Blumenbach

Johann Friedrich Blumenbach was an 18th-century German physician, naturalist, physiologist, and anthropologist, noted for his influential work in the field of craniometry and racial classification theories.

Racial Identities

Social identities formed around the concept of race, often influencing an individual’s social experiences and how they are perceived by others.

Scientific Basis

The foundation of knowledge based on empirical evidence and formulated theories subject to the principles of the scientific methods.