<h2>Long short story: I tried ;-; </h2>
There are 25 kids in a class, and the number of boys is 2/3 of the number of girls. How many boys and how many girls are in this
1 answer:
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We want to find the value that makes
To find it we must look at the standard normal table, using the complementary cumulative table we find that
Then, using the z-score we can find the minimum score needed, remember that
Where
σ = standard deviation
μ = mean
And in our example, x = minimum score needed, therefore
Rounding to the nearest integer the minimum score needed is 568, if you get 568 you are at the top 20.1%.