Waiting time. A costumer at a special coffee shop observed the amount of times, in minutes, that each of 20 costumers spent waiting to receive an order. The results are recorded in the table below. 3.2 4.0 3.8 2.4 4.7 5.1 4.6 3.5 6.2 3.5 4.9. 4.5 5.0 2.8 3.5 2.2 3.9 5.3 2.9 3.5 Find the mean and sample standard deviation if these data. Round off to the nearest hundredth.

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