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Suppose the scores on a trivia quiz are normally distributed with a mean of 80 and a standard deviation of 5.

Which group describes 16% of the population of trivia quiz scores?

 

scores below 70

scores below 75

scores above 83

scores above 90

 Apr 19, 2019
 #1
avatar+6046 
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16% of the population has z-scores from -infinity to -1

 Apr 19, 2019
 #2
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so whats the answer?

Guest Apr 19, 2019
 #6
avatar+6046 
+1

the answer is take the hint I gave you and do your own #$)(*# work

Rom  Apr 23, 2019
 #3
avatar+106533 
+1

16%  of the population  will be 1 standard deviation (or more)  below the mean.....this is a score of 75

 

So....this represents all the scores below 75

 

[ 16% will also have scores above 85....but this isn't a choice ]

 

cool cool cool

 Apr 19, 2019
 #4
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+1

Thanks! You are a math genius bro. How you get so good at math?

Guest Apr 19, 2019
 #5
avatar+106533 
0

I'm not that good....just sometimes lucky.....

 

 

cool cool cool

CPhill  Apr 19, 2019

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