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Kind of confused how I should set this up. Police officer feels 20% of his employees did a horrible job. If failure is correct, then the probability is 73 are from 30 to 40 will be due to the...

when you have the probability and the mean, how do u figure out the standard deviation and the z score. Mean is 47.3. probability is 0.25.

When using the z score equation and you know the mean and standard deviation, but how do you figure out the X. Is x the mode or median?

how do u find x and z score?

standard deviation, the probability is 0.20 and value greater than 79.2. normal distribution with mean of 62.4.