Image caption, To find the mean age, use a calculator to divide the total age of all the children (168) by how many children there are (15). 168 ÷ 15 = 11.2. The mean age is 11.2 years old.
They have the same average but mean something very different when you are planning your rent or mortgage payments. Situations ...
The statistical formula for a value's z-score is calculated using the following formula: Where: Calculating a z-score requires that you first determine the mean and standard deviation of your data.
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