Mean Is Simply 80, But You Couldnt Imagine How Bad Or How Good All Of Students Score Without Looking At Each Score. Another way to think about them is when you have list of student scores. To calculate how close those numbers are to each other and how far away another one is to each other as well, you would have to use standard deviation, which is variance but with little more complicated formula. However, when you calculate each data set average, you get same value of both. First One Has Numbers That Are Very Close To Number, And Other One Is Far Away From Each Other, Far Away From That Number. If youre familiar with them, let think about them this way. Its most used formula, and others you may recognize, are variance, mean, and range, which are often used to solve same math problem. If youre familiar with math of measuring dispersion, you know how important standard deviation is. Heres how to calculate deviation in Google Sheets. Sometimes it is important to measure dispersion of values, and one of best formulae is standard deviation, which Google Sheets also provide.
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