Somewhere back in your middle school and high school math classes, you no doubt learned about the mean and standard deviation as fairly fundamental concepts in arithmetic and statistics. You also knew ...
When reviewing cash flow data for your small business, knowing the standard deviation can help you determine if the numbers are out of whack. Calculating standard deviation manually can be ...
The patterns seen in math are also evident on the LTT Reading test (click on tabs to see reading scores) but at mercifully smaller sizes. Since 2012, the 10th percentile reading scores are down 31 ...
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