Standard Deviation Flashcards

1
Q

What is “standard deviation?”

A
  • Standard deviation is a measure of how much all your repeats vary from the mean value.
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2
Q

Why is standard deviation more useful than calculating the range of data? 3 main reasons!

A

1.) SD shows spread of data from the mean, whereas, range is only difference between the highest/ lowest value.
2.) SD reduces the effect of anomalies whereas, range includes anomalies.
3.) SD can be used to indicate whether a difference between results is significant.

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3
Q

Why would standard deviation be useful for making a conclusion from data?

A
  • Overlaps between SD, shows that there is likely to be significant difference between the mean values.
  • No overlap between SD shows that it is likely there is NO significant difference between the mean values.
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