Standard Deviation Flashcards by siobhan mills | Brainscape

Q

What is standard deviation?

A

A measure of the spread of data around the mean

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Q

If the +-2 standard deviations don’t overlap…

A

We reject the null hypothesis. There is a statistically significant difference between the means

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Q

Advantages of using standard deviation

A

Reduces the effect of anomalies compared to using the range
Can use +-2SD to determine if a difference in results is significant or not
Takes into account every value in the data set (representative)

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