Question

Need help bad on this https://prnt.sc/r2zW6Efkl0gW

Answer 1

@jhonyy9

Answer 2

Can't see screenshot to help

Answer 3

I was able to view the information.

For each problem you'll need to convert the z-score to the appropriate area underneath the curve. Typically, a z-table or calculator will give you the area to the *left* of the z-score. So if you need to find the area to the *right* you'd simply need to calculate 1 - (the area to the left) to get the area to the right.

I can walk you through problem a) and let you try b) and c) on your own.

a) area to the left of z = -3 and to the right of z = 3

I used this calculator:

https://www.calculator.net/z-score-calculator.html

and plugged in z = -3 to get P(x<Z) = 0.0013499 so the area to the left of z = -3 is 0.0013499.

now, because a normal distribution is symmetric, the area to the right of z = 3 is actually the same, 0.0013499. you can confirm this by typing z = 3 into the calculator and noting P(x>Z) is also 0.0013499. add these areas together. then round to 4 places as indicated.