Q 122

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

Q 124

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 ______.
A) 53.5
B) 51.75
C) 57.5
D) 58.75