The time it takes me to wash the dishes is uniformly distributed between 7 minutes and 16 minutes.  What is average time that takes me to wash the dishes? What is the standard deviation of the time that takes me to wash the dishes?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.3: Special Probability Density Functions
Problem 7E
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The time it takes me to wash the dishes is uniformly distributed between 7 minutes and 16 minutes.  What is average time that takes me to wash the dishes? What is the standard deviation of the time that takes me to wash the dishes?

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