I have a problem solving this exercise. I have this: P(0<=Z<=z_2)=0.3 P(Z<=z_1)=0.3 P(z_1<=Z<=z_2)=0.8 I need to find the z values for each given probability. I already solved the first and the second like this: I calculated the inverse standard normal distribution (with LibreOffice Calc) and I found that z_2 is 0.841 I calculated the inverse standard normal distribution (with LibreOffice Calc) and I found that z_1 is −0.524 How can I find z_1 and z_2 of the third point of the exercise?

What is the range of the function ${\displaystyle y=x^2}$?

The domain and range of $y=\sin <!--\; \; -->x$ is
A)$R,[0,\mathrm{\infty <!--\; \infty \; -->}]$
B)$R,[-<!--\; -\; -->1,1]$
C)$R,[-<!--\; -\; -->\mathrm{\infty <!--\; \infty \; -->},\mathrm{\infty <!--\; \infty \; -->}]$
D)$R,[1,\mathrm{\infty <!--\; \infty \; -->}]$

Mean of the squares of the deviations from mean is called the:
Variance
Standard deviation
Quartile deviation
Mode

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