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To get the best deal on a stereo system, Louis called8 out of 20 appliance stores in his neighborhood and asked for the cost of

  1. To get the best deal on a stereo system, Louis called8 out of 20 appliance stores in his neighborhood and asked for the cost of a specific model. Below is the sample data set of prices he collected:

$216$135$281$189$218$193$299$235

Find the standard deviation.

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