EJU Mathematics Course 2 practice 78: A score of 69 comes from a distribution with mean 53 and standard deviation 8. What is its z-score?
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z=(x−mean)/sd=2.
Practice eju-math-course-2 questions with answers and explanations.
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z=(x−mean)/sd=2.
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Repeated multiplication gives 31381059609.
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f′(x)=10x+6; substitute x=7.
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An antiderivative is 6x²+2x, giving 400.
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The conjugate changes the sign of the imaginary part.
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z=(x−mean)/sd=2.
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log x + log y = log(xy).
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The sum is 3(1+…+5)=3×15=45.
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Scalar multiplication multiplies every component.
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f′(x)=10x+3; substitute x=7.
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An antiderivative is 6x²+6x, giving 432.
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The conjugate changes the sign of the imaginary part.