Which is the value of the expression? (-2)4

Mathematics

2 answers:

Virty [35]2 years ago

4 0

The answer is b.-8 , hope that helps

Anarel [89]2 years ago

3 0

Answer:

Step-by-step explanation:

-2×4

=-8

a negative number multiplied by a positive number gives a negative number that is why it is -8 and not 8

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Sloan [31]

B, 190.
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3 years ago

Consider a value to be significantly low if its z score less than or equal to minus−2 or consider a value to be significantly hi

den301095 [7]

Answer:

Test scores of 10.2 or lower are significantly low.

Test scores of 31 or higher are significantly high

Step-by-step explanation:

Z-score:

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:

$\mu = 20.6, \sigma = 5.2$