Question 1191028
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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;  or between two given scores;  or above the given score.


It can be done in different ways:


            - manually,    or


            - using online calculator,    or


            - using your pocket calculator.



                    MANUALLY



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

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



                USING  ONLINE  CALCULATOR



To do it 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,  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)



Find there  EVERYTHING  you need to know in clear and compact form.

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  ( ! )