In testing the difference between two population means using two independent samples, we use the pooled variance in estimating the standard error of the sampling distribution of the sample mean difference
Answer : the population are normal with equal variances
Mathematics
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Multiply the monomials.x5 ? x6
A. x5 + x6 B. x11 C. x30 D. 2x11
Mathematics
Determine the degree of the polynomial.-15 - 2x - 4x2 - 18x3 - 17x4
A. -13 B. -17 C. 4 D. 21
Mathematics
Match the given function to its graph.1) y = 2 sin
2) y = 2 sin
3) y = 2 cos
4) y = 2 cos
A)B)
?
height="200" width="200" />C)D)
?
A. 1B, 2D, 3A, 4C
B. 1C, 2A, 3D, 4B
C. 1A, 2C, 3D, 4B
D. 1A, 2C, 3B, 4D
Mathematics
Find a rectangular equation for the plane curve defined by the parametric equations.x = 4 sin t, y = 4 cos t; 0 ? t ? 2?
A. y = 
= 16; for x in -? < x < ?
B. x2 + y2 = 16; for x in -4 ? x ? 4
C. y = x2 - 9; for x in -2 ? x ? 2
D. y2 - x2 = 16; for x in -? < x < ?
Mathematics