Question 1193039
.


The normal distribution curve is a bell shaped curve.


These questions are to determine the areas under the normal distribution curve
below the given score;  above the given score  or between two given scores.


It can be done in different ways:


            - manually,    or


            - using online calculators,    or


            - using your pocket calculator.



                    MANUALLY



To do the job manually,  use this  Table representing  AREA  to the  LEFT  of the  Z-score

https://www.math.arizona.edu/~rsims/ma464/standardnormaltable.pdf


On how to do it,  see this Internet text source

http://statisticshelper.com/how-to-use-the-z-table



                USING  ONLINE  CALCULATOR



To do the job using an online  (free of charge)  calculator,  go to this web-site
https://onlinestatbook.com/2/calculators/normal_dist.html



Input the given parameters of each question into an appropriate window of the calculator and get the answers

to your questions.



The calculator has perfect description and design,  as well as clear visual interface, which prevents you of making errors.

So  EVERY  person,  even beginner,  may work with it on his or her own,  even having minimum knowledge on the subject.



                USING  YOUR  POCKET  CALCULATOR



On how to use it,  see a text description in  THIS  Internet source / site

https://mathbits.com/MathBits/TISection/Statistics2/normaldistribution.htm



Or see these  Youtube video-lessons


https://www.youtube.com/watch?v=bVdQ7OzGvU0      (for  Casio fx-991 MS)

https://www.youtube.com/watch?v=yYpMkgB20C4      (for  TI-83  or  TI-84 calculators)



I recommend you to play with the online calculator first.
If you are unfamiliar with the subject, playing with the online calculator will help you a lot !



After learning it, you will be able to solve this problem  (and thousand other similar and different problems)  ON  YOUR  OWN,

without asking for help from outside.



Happy learning  ( ! )