Pop Quiz: Which statistics formula, when shown to a math-challenged student, causes the student to close the textbook so fast that it blows out the candles in the room?

If you answered, "all of them," you would probably be correct. However, the answer most relevant to the newest calculator (#222) is, the standard depreciation formula.

Thankfully, as you will see from the example tutorial on the page, solving for variance and standard depreciation is MUCH easier than deciphering the formula! -Dan

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