Question

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

Answer 1

maybe C or B

Answer 2

Well that narrows it down..

Answer 3

yup it sure does lol :P

Answer 4

So which one

Answer 5

give me 2 min

Answer 6

ok ok

Answer 7

try B

Answer 8

D or C i think

Answer 9

Lololololololol so D?

Answer 10

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

Answer 11

hold on ill check my answer

Answer 12

@shinebrightlikeadimon

Answer 13

ill be back

Answer 14

ok see you soon