Question: please answer B and C. thank you! The following values represent the number of smartphones sold per day at a local cell phone retail store

please answer B and C. thank you!

The following values represent the number of smartphones sold per day at a local cell phone retail store during the last 10 business days 15 8 10 12 21 11 11 16 6 14 a) Calculate the range b) Calculate the variance c) Calculate the standard deviation

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