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Variance given standard deviation?
John got a score of 75 on a math test with a mean of 50. Suppose his test result is 2.5 standard deviations away from the mean, what is the variance of the test. Show your work. If...
need explanation on standard deviation?
e.g if the distribution is normal and there are 48 observations, the highest is 80 and the lowest is 20, and the standard deviation is 4. Does this standard deviation seem reasonab...
Interpreting the standard deviation?
Hi I am trying to interpret the standard deviation that I found on excel worksheet. I had two sets of data. On one, the average equaled 10.77 and the Standard deviation came out to...
Standard deviation/ Statistics?
Please, help. I do not understand the question and what to do to figure this out. Thank you for your time. Both of the following lists have the same average of 50. Which one has ...
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