The following table shows the distribution of household incomes for a sample of 1,000 households in the U.S. with incomes up to $100,000.
Income Bracket0 - 19,99920,000 -39,99940,000 - 59,99960,000 - 79,99980,000 - 99,999Households270290190150100?
Use this information to estimate, to the nearest $1,000, the average household income for such households.
?
A. 
B. 
C. ?
D. 
E. 
Answer: B
Mathematics
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Compute r, the linear coefficient of correlation, for the given data.Two different tests are designed to measure employee productivity and dexterity. Several employees are randomly selected and tested with these results.
A. 0.115 B. 0.471 C. 0.986 D. -0.280
Mathematics
Write a system of equations associated with the augmented matrix. Do not try to solve.
= 
A. 2x + y = -3 x + 2y = 2 -5x - 5y = 2 B. 2x + y + z = -3 x - 5y = 2 C. 2x = -3 x + y = 2 -5x - 5y = 2
Mathematics
Find the indicated term of the arithmetic sequence.
, 1, 
, . . . ; a16
A. 
B. 7
C. 
D. 8
Mathematics
Determine whether the given point is on the graph of the equation.2x + 2y2 = 20; (6, -2)
A. Yes B. No
Mathematics