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anonymous
 one year ago
The scores of eighthgrade students in a math test are normally distributed with a mean of 57.5 and a standard deviation of 6.5. From this data, we can conclude that 68% of the students received scores between and .
anonymous
 one year ago
The scores of eighthgrade students in a math test are normally distributed with a mean of 57.5 and a standard deviation of 6.5. From this data, we can conclude that 68% of the students received scores between and .

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The standard deviation is a measure of how spread out numbers are. Its symbol is \[\sigma\] (the greek letter sigma) The formula is easy: it is the square root of the variance.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Do you know what a variance is?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The variance is basically the average of the squared differences from the mean. To calculate the variance follow these steps: Work out the mean (the simple average of the numbers) Then for each number: subtract the mean and square the result (the squared difference). Then work out the average of those squared differences.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0btw, do u have any answer choices?
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