For 54 60 62 52: σ=4.761
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To see how wide spread the results are. If the average (mean) grade for a certain test is 60 percent and the standard deviation is 30, then about half of the students are not studying. But if the mean is 60 and the standard deviation is 5 then the teacher is doing something wrong.
8.919280881 is the standard deviation for those numbers.
I would say in America the mean IQ is about 60 and the standard deviation is about 15, this is about true for all ages.
There is insufficient information in the question to answer it. In order to compute a mean and a standard deviation, you need at least two data points, but the question only gave one. Please restate the question.
They are: 50 52 54 56 58 and 60