I may need some help

Mathematics

2 answers:

VikaD [51]3 years ago

8 0

i have to poop hhhhhjhhjhjhjhjhjhjhh

Evgen [1.6K]3 years ago

7 0

Heres a trick in order identify if a graph is a function or not. Draw a line vertically over the graph (or use a ruler instead) and see whether there are two or more points that touch the line. This is called the vertical line test. So for the first graph, you can already tell that if you were to draw a line over the graph you wont get points that overlap, therefore it is a function. Hope this helps!

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A college requires applicants to have an ACT score in the top 12% of all test scores. The ACT scores are normally distributed, w

DochEvi [55]

Answer:

a) The lowest test score that a student could get and still meet the colleges requirement is 27.0225.

b) 156 would be expected to have a test score that would meet the colleges requirement

c) The lowest score that would meet the colleges requirement would be decreased to 26.388.

Step-by-step explanation:

Problems of normally distributed samples are solved using 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 problem, we have that:

$\mu = 21.5, \sigma = 4.7$