Question 1199249
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Assume that the amounts of weight that male college students gain during their freshman 
year are normally distributed with a mean of 1.3 kg and a standard deviation of 5.6 kg.
If one male college student is randomly​ selected, find the probability 
that he gains between 0 kg and 3 kg during freshman year.
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<pre>
Every normal distribution curve is a bell shaped curve.

In this problem, they want you determine the area under this specific normal curve
between the raw marks from 0 to 3 kg.  This area is the sought probability.


Go to web-site https://onlinestatbook.com/2/calculators/normal_dist.html
and find there free of charge online calculator, specially developed for this purpose.

Input the mean value 1.3 and the standard deviation value 5.6;
input 0 and 3 in the window "Between"; then click "Recalculate".

You will get the <U>ANSWER</U>  0.2111  in the window "Probability".

The auxiliary plot will show you the area of the interest.


Now, when you know "what to do", I will tell you that you can get the same result 
using your calculator  TI-83 or TI-84 (or whatever).

For it, use the calculator' standard function normalcdf with parameters

                   z1  z2  mean SD   

     P = normalcdf( 0,  3, 1.3, 5.6) = 0.2111.

You will get the same value of the probability 0.2111 from your calculator.
</pre>

At this point, the solution is completed.



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From my post, you learned two methods/approaches of solving such problems.