ElleriX237663 ElleriX237663

25-10-2022
Mathematics

contestada

Hello, can you help me with a Standard deviation question, please?

Respuesta :

LuanaK489278 LuanaK489278

25-10-2022

To now how many had a score under 66, we have to calculate the following probability

[tex]P(X<66)=P(Z<\frac{66-81}{5})=P(Z<-3)=0.0013[/tex]

So the amount of people that had a score under 66 is

[tex]4502\cdot0.0013=5.86\approx6[/tex]

So 6 people get a score under 66

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