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3 years ago

For a population with u=100 and a=20, what is the z-score that corresponds to x=90?

1 answer:

max2010maxim [7]3 years ago

3 0

I guess that u = μ & that a=σ. If so:

μ =100 & that σ =20 & x=20

Z score = (x-μ) / σ ==> Z score = (90-100)/20 ==> Z = - 0.5

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Step-by-step explanation:

Given

$\frac{27a^9 * 18b^5 * 4c^2 }{18a^4 * 12b^2 * 2c}$

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$\frac{27a^9 * 18b^5 * 4c^2 }{18a^4 * 12b^2 * 2c}$

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$\frac{27a^9 * b^5 * 4c^2 }{a^4 * 12b^2 * 2c}$

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$\frac{27a^9 * b^5 * 2c^2 }{a^4 * 12b^2 *c}$

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Apply law of indices

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