Suppose the Dealer Incentive Per Vehicle for Honda's Acura Brand
Suppose the dealer incentive per vehicle for Honda's Acura brand in 2012 is thought to be bell-shaped and symmetrical with a mean of $2,500 and a standard deviation of $300.Based on this information,what interval of dealer incentives would we expect approximately 99.7% of vehicles to fall within?
A) $2,200 to $2,800
B) $1,900 to $3,100
C) $1,600 to $3,400
D) $1,300 to $3,700
Suppose the average price for new cars in 2012 has a mean of $30,100 and a standard deviation of $5,600.Based on this information,what interval of prices would we expect at least 89% of new car prices to fall within?
A) $24,500 to $35,700
B) $18,900 to $41,300
C) $13,300 to $46,900
D) $7.700 to $52,500
There are five rows of students seated in a marketing class.The following table shows the number of students in each row and the average score of the most recent test for that row. What is the average test score for this class?
The director of graduate admissions is analyzing the relationship between scores in the Graduate Record Examination(GRE)and student performance in graduate school,as measured by a student's GPA.The table below shows a sample of 10 students. The covariance is ______.