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Fiesta28 [93]
3 years ago
7

Find the following rates. Round your answer to the nearest hundredth. a. ? % of 75 = 5 b. ? % of 28 = 140 c. ? % of 100 = 40 d.

? % of 200 = 15
Mathematics
1 answer:
Nimfa-mama [501]3 years ago
5 0
A.15 b.500 c.40 d.7.5 yeah, not to confident but I think it's correct.
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sertanlavr [38]

Answer:

d. -1.9; not unusual

Step-by-step explanation:

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that;

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So

Z = \frac{X - \mu}{\sigma}

Z = \frac{50 - 69}{10}

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A z-score of -1.9 is higher than -2 and lower than 2, so it is not unusual.

So the correct answer is:

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Savatey [412]

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7 0
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Answer:

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