What does inequality mean?

2 answers:

4 0

Inequality in math or in social studies?

in math, inequality means the expression on the right hand side is not equal to the expression on the left hand side.

Anni [7]3 years ago

4 0

Hello there,

The word <span>inequality means something that is not equaled to or something that is the opposite of what is equal.

~Jurgen</span>

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$z=-0.842$

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$a=30 -0.842*7.8=23.432$

So the value of height that separates the bottom 20% of data from the top 80% is 23.432.

Step-by-step explanation:

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

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Where $\mu=30$ and $\sigma=7.8$

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$P(X>a)=0.80$ (a)

$P(X$ (b)

As we can see on the figure attached the z value that satisfy the condition with 0.20 of the area on the left and 0.80 of the area on the right it's z=-0.842

If we use condition (b) from previous we have this:

$P(X$