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Mathematics 16 Online
OpenStudy (anonymous):

Percentage grade averages were taken across all disciplines at a particular university, and the mean average was found to be 83.6 and the standard deviation was 8.7. If 18 classes were selected at random, find the probability that the class average is less than 80. A. 0.0235 B. 0.0396 C. 0.7427 D. 0.1730

OpenStudy (anonymous):

maybe C or B

OpenStudy (anonymous):

Well that narrows it down..

OpenStudy (anonymous):

yup it sure does lol :P

OpenStudy (anonymous):

So which one

OpenStudy (anonymous):

give me 2 min

OpenStudy (anonymous):

ok ok

OpenStudy (anonymous):

try B

OpenStudy (anonymous):

D or C i think

OpenStudy (anonymous):

Lololololololol so D?

OpenStudy (anonymous):

Put all of the numbers in order and add and then you have a arithmetic mean so its D i think

OpenStudy (anonymous):

hold on ill check my answer

OpenStudy (anonymous):

@shinebrightlikeadimon

OpenStudy (anonymous):

ill be back

OpenStudy (anonymous):

ok see you soon

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