SOLUTION: Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)

Question 1195530: Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)
𝜇 = 20; 𝜎 = 3.8
P(x ≥ 30) =
Answer by ikleyn(52805) (Show Source): You can put this solution on YOUR website!
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Assume that x has a normal distribution with the specified mean and standard deviation.
Find the indicated probability. (Enter a number. Round your answer to four decimal places.)
𝜇 = 20; 𝜎 = 3.8
P(x ≥ 30) =
~~~~~~~~~~~~~~~~~~~~~~~

The normal distribution curve is a bell shaped curve.

The question is to determine the area under the GIVEN normal distribution curve to the right of 30 units.

Go to website

https://onlinestatbook.com/2/calculators/normal_dist.html

and use free of charge online calculator specially intended for this purpose.

Input 20 in the port window " Mean ";

input 3.8 in the port window " SD "; ( <<<---=== SD means "standard deviation" )

input number 30 in the port windows " ABOVE ".

Then click the button " Recalculate ".

You will get the 0.0042 in the window " Area (probability) ".

The shaded area in the plot shows you the area of the interest.

Every time as you get similar problem, you can solve it this way.

This way is the easiest and shortest way to learn the subject.

When you learn the subject enough, you will be ready and may start learning other ways.

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