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1 year ago

Help me please I beg you

Mathematics

1 answer:

bixtya [17]1 year ago

8 0

Ok so the midpoint formula is (x1+x2)/2 , (y1+y2)/2
You want to find the midpoint of (-4,8) and (4,-2).
Just plug the numbers in the formula and you get (4-4)/2 , (-2+8)/2 which equals 0/2 , 6/2 which tells you that the midpoint is (0,3).

Your answer should be (0,3)
Hope it helps!

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3 years ago

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Answer:

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And we can find this probability with the normal standard distirbution or excel and we got:

$P(z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the lenghts of a population, and for this case we know the distribution for X is given by:

$X \sim N(80,5)$

Where $\mu=80$ and $\sigma=5$

We are interested on this probability

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And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

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3 years ago

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