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Simora [160]
3 years ago
7

What two numbers add up to -8 and multiply to 15

Mathematics
2 answers:
IrinaVladis [17]3 years ago
5 0
Ok. This seems like a quadratic equation.

-5*-3 = 15
and
-5+(-3) = -8
<span>
</span><span>-- CocaBeanz has got your back :)</span>

miss Akunina [59]3 years ago
5 0
-5 and --3 multiply to 15 and add up to -8
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Answer:

The probability that the sample proportion is between 0.35 and 0.5 is 0.7895

Step-by-step explanation:

To calculate the probability that the sample proportion is between 0.35 and 0.5 we need to know the z-scores of the sample proportions 0.35 and 0.5.

z-score of the sample proportion is calculated as

z=\frac{p(s)-p}{\sqrt{\frac{p*(1-p)}{N} } } where

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For the sample proportion 0.35:

z(0.35)=\frac{0,35-0.41}{\sqrt{\frac{0.41*0.59}{72} } } ≈ -1.035

For the sample proportion 0.5:

z(0.5)=\frac{0,5-0.41}{\sqrt{\frac{0.41*0.59}{72} } } ≈ 1.553

The probabilities for z of being smaller than these z-scores are:

P(z<z(0.35))= 0.1503

P(z<z(0.5))= 0.9398

Then the probability that the sample proportion is between 0.35 and 0.5 is

P(z(0.35)<z<z(0.5))= 0.9398 - 0.1503 =0.7895

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