A final exam in Math 160 has a mean of 73 with standard deviation 7.8. If 24 students are randomly selected, find the probability that the mean of thier test scores is greater than 78.

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A final exam in Math 160 has a mean of 73 with standard deviation 7.8.  If 24 students are randomly selected, find the probability that the mean of thier test scores is greater than 78.



Answered Same DayDec 20, 2021

Answer To: A final exam in Math 160 has a mean of 73 with standard deviation 7.8. If 24 students are randomly...

David answered on Dec 20 2021
130 Votes
Z is the required value we want
X is the value we want to convert
u is the mean and
sigma is
variation
Here we can replace s by z for convenience
Substituting the values we have
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