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klemol [59]
3 years ago
9

What is the absolute value of -22

Mathematics
2 answers:
Bond [772]3 years ago
8 0
The absolute value of a number is always positive. It is the distance the number is away from zero.
|-22| = 22
WINSTONCH [101]3 years ago
4 0
Solve:-

|-22| = ?

The absolute value of a number is always postie, whether it is a positive or negative number. It it is a positive number than the absolute value is that number, but if it is a negative number, it is the positive value of that number. 

|-22| = 22

Examples:-

|38| = 38
|-5| = 5
|5| = 5
|-38| = 38 
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A professor gives her 100 students an exam; scores are normally distributed. The section has an average exam score of 80 with a
frozen [14]

Answer:

6.18% of the class has an exam score of A- or higher.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

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 question, we have that:

\mu = 80, \sigma = 6.5

What percentage of the class has an exam score of A- or higher (defined as at least 90)?

This is 1 subtracted by the pvalue of Z when X = 90. So

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

Z = \frac{90 - 80}{6.5}

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