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Nutka1998 [239]
3 years ago
6

1. Jay said, “The amount of money in my checking account is less than $50.00, but greater than $40.00.” Which statements about t

he possible value of the money are true?
Mathematics
1 answer:
Pepsi [2]3 years ago
4 0
I don't know the options but I guess it would be something like this:
40,000 < x < 50,000
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b) The minimum score for an A is 84.68.

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Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

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

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Mean of 61 and a standard deviation of 8.

This means that \mu = 61, \sigma = 8

(a) What score do 25% of the students exam scores fall below?

Below the 25th percentile, which is X when Z has a p-value of 0.25, that is, X when Z = -0.675.

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

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25% of the students exam scores fall below 55.6.

(b) Suppose the professor decides to grade on a curve. If the professor wants 0.15% of the students to get an A, what is the minimum score for an A?

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X = 84.68

The minimum score for an A is 84.68.

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