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January 31, 2015

January 31, 2015

Posted by **Jane Segurra** on Wednesday, March 20, 2013 at 9:26pm.

(a) What average must you exceed to obtain an A?

(b) What average must you exceed to receive a grade of C or better?

(c) What average must you obtain to pass the course? (You'll need a D or better.)

- STAT 250 Probability -
**Reiny**, Wednesday, March 20, 2013 at 10:41pmI will let you play with

http://davidmlane.com/normal.html

click on "value from an area" and enter

mean: 66

sd: 10.5

click on below and enter .95 in area

I get 83.275

So 95% of the students will have a score of less than 83

the next 15 % will get a B

so 20 % will get either A or B

and 80% will not get A or B

click on below and enter .8 in area

I got 74.835 or 75% to 83 will get you a B

67% will get at least a C

enter .67 in area to get 70.615

I will let you continue

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