The first seven customers of the day at a small donut shop have checks of $1.25, $2.36, $2.50, $2.15, $4.55, $1.10, and $0.95, respectively. Based on the number of customers served each day, the manager of the shop claims that the shop needs an average check of $1.75 per person to stay profitable. Given her contention, has the shop made a profit in serving the first seven customers?
A computer and statistical software will be desirable and useful. However, any necessary calculations can also be done with the aid of a pocket calculator. For readers using statistical software, keep in mind the file-naming key€” for example, the data for Exercise 3.57 will be in data file XR03057.
In exercise

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2.20 195 2.15 2.08 85 92 2.23 2.19 98 2.07 2.24 2.31 196 2.30 2.27 .89