0gNanaa
18.03.2021 •
Mathematics
I need help with this somebody help me out!!
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Ответ:
Step-by-step explanation:
i am so sorry pls I don't know
Ответ:
Ответ:
Step-by-step explanation:
Let X the random variable that represent the head breadths of a population, and for this case we know the distribution for X is given by:
Where and
We want the range of the middle 50% values on the distribution. Since the normal distribution is symmetrical we know that in the tails we need to have the other 50% and on each tail 25% by symmetry.
We can use the z score formula given by:
The critical values that accumulates 0.25 of the area on each tail we got:
And if we solve x from the z score we got:
And replacing we got: