Find the standard deviation of the probability density function to the nearest hundredth.f(x) = 4x-5; [1, ?]
A. 0.47
B. 0.44
C. 0.50
D. 0.57
Answer: A
Mathematics
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Assume that a sample of bivariate data yields the correlation coefficient, r, indicated. Use the critical values table for the specified sample size and level of significance to determine whether a linear correlation exists.r = 0.305 when n = 5 at ? = 0.05
A. No B. Yes
Mathematics
Simplify.
A. -35 B. -5 C. 7 D. 5
Mathematics
Factor. Check by multiplying.10x2 - 2x
A. 2(5x2 - x) B. 2(5x2 + x) C. x(10x - 2) D. 2x(5x - 1)
Mathematics
Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. 3x + y + z - 2w = 10 2x + 3y + 3z + w = -52x + y + 4z + 11w = 11
A. {(6, -4, -2, 1)} B. {(2w + 3, 6w - 7, -10w + 8, w)} C. {(7, -1, -6, 2)} D. {(w + 5, 3w - 7, -4w + 2, w)}
Mathematics