Solve. To measure the spread of data, statisticians compute the sample variance of the data. For a sample of size 3, the sample variance can be computed using the expression 
where m is the mean of the three values a, b, and c. Rewrite this expression without parentheses, combining like terms.
A. 3m2 - 2am - 2bm - 2cm + a2 + b2 + c2
B. 
C. 
D. 
Answer: D
You might also like to view...
Divide.19.2 ÷ (-2.4)
A. -8 B. 0.8 C. -0.8 D. 8
Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.(-4x3y)4
A. (-4)4x7y4 B. -16x3y C. -16x3y4 D. (-4)4x12y4
Solve the problem.An electric company has the following rate schedule for electricity usage in single-family residences:Monthly service charge $4.93Per kilowatt service charge1st 300 kilowatts$0.11589/kWOver 300 kilowatts$0.13321/kWWhat is the charge for using 300 kilowatts in one month?What is the charge for using 375 kilowatts in one month?Construct a function that gives the monthly charge C for x kilowatts of electricity.
What will be an ideal response?
Solve.Given that sin (2?/5) ? 0.9511 and cos (2?/5) ? 0.3090, find 
A. sec (?/10) ? 0.7968 B. sec (?/10) ? 1.0514 C. sec (?/10) ? 0.3249 D. sec (?/10) ? 1.4526