Marks on an exam are normally distributed with expected value 50 and standard deviation 10. You should demonstrate your working out and draw diagrams. What percentage of the students get а. (i) <30; (ii) between 30 and 50; (iii) over 50. b. What mark does a student need to get into the top 15%.

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Please draw the diagrams for these questions as I asked the question before your colleague solved but he didn't draw the diagram, and they are trully necessary.

 

If you wish to add the equations great if not I already have them what I really need are the diagrams.

 

Thank you

 

 

7.
Marks on an exam are normally distributed with expected value 50 and standard deviation 10. You
should demonstrate your working out and draw diagrams.
What percentage of the students get
a.
(i) <30;
(ii) between 30 and 50;
(iii) over 50.
b. What mark does a student need to get into the top 15%.
Transcribed Image Text:7. Marks on an exam are normally distributed with expected value 50 and standard deviation 10. You should demonstrate your working out and draw diagrams. What percentage of the students get a. (i) <30; (ii) between 30 and 50; (iii) over 50. b. What mark does a student need to get into the top 15%.
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