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anonymous
 3 years ago
On an exam, a class ended with a mean raw score of 80 with standard deviation of 10. The distribution of grades in the class was approximately normal. If the teacher wants to give "A" to the top 25th percentile (top 25%) of the class, what is the lowest raw score we could get and still get an "A" on the exam?
anonymous
 3 years ago
On an exam, a class ended with a mean raw score of 80 with standard deviation of 10. The distribution of grades in the class was approximately normal. If the teacher wants to give "A" to the top 25th percentile (top 25%) of the class, what is the lowest raw score we could get and still get an "A" on the exam?

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0standard deviation of 10

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0lol i mean how many deviation points wud u have to travel, to be left with only 25% area on the right side

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0look up the probability distribution graph numbers

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Sorry sir, I could not follow you. Could you please explain

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0look at that and see at what standard deviation you have to be to be left with only 25% area on the right side

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Is it 21% with 0.8 standard deviation?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0It is only one standard deviation point above the mean is to be covered. Isn't it? Other please explain

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0how much more deviation does she have to go to cover upto 75%

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0look at that chart and figure it out

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0its somewhre inbetween 0.5 and 1

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0so 0.75 of 10 = ? 7.5 marks

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0then 87.5 should be the marks she needs to set it at

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0im just estimating values here, im sure u got some formulas to calculate the exact z values and stuff

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0This Z values I am not aware sir. I am just browsing about this

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0this will give u more accurate vlaue

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1373534025223:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0what is this equation you have used

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0at 0.5 deviation on right how much percent have you covered?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0and how did you get 0.37

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0do you know the answer already

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0????? 5*6/15=0.37 ????

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0whats the answer supposed to be

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0i cant help you if u arent answering my questions

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0No. Idon't know the answer

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0then dont bother with stuff

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0first understand the graph

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0I want to know more about this Z score

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0the graph is pretty self explanatory and questions about it?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Now it is clear. But one question. May I ask

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Why did you divide by 15. It is only 14 parts. Right

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Sorry. Now I have fully understood.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0It is not the 14 parts. It is the area of that part.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Thank you very much explaining in detailed manner

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Thanks for your patience and analysing for a lehman.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Mean 80 standard deviation 10 z=0.67 X=73.3

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0mine answer is 73.3 marks min to get A

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0you have to take Z value 0.67

dan815
 3 years ago
Best ResponseYou've already chosen the best response.0musadiq no try taking 0.67 Z

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0well table value is 0.67 that's lies at left side !
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