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An unknown distribution has a mean of 90 and a standard deviation of 15. A sample...

An unknown distribution has a mean of 90 and a standard deviation of 15. A sample of size 80 is drawn randomly from the population. Find the probability that the sum of the 80 values ( or the total of the 80 values) is more than 7,300.

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Answer:-

Given that:-

An unknown distribution has a mean of 90 and a standard deviation of 15. A sample of size 80 is drawn randomly from the population.

Find the probability that the sum of the 80 values ( or the total of the 80 values) is more than 7,300.

Mean   Standard deviation   

a) n= 80

From Z- table

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