Question
Many fast-food restaurants have soft drink dispensers with preset amounts, so that when the operator merely pushes a button for the desired drink the cup
Many fast-food restaurants have soft drink dispensers with preset amounts, so that when the operator merely pushes a button for the desired drink the cup is automatically filled. This method apparently saves time and seems to increase worker productivity. To test this conclusion, a business analyst randomly selects 18 workers from the fast-food industry, 9 from a restaurant with automatic soft drink dispensers and 9 from a comparable restaurant with manual soft drink dispensers. The samples are independent. During a comparable hour, the amount of sales rung up by the worker is recorded. Assume that [Math Processing Error]=.01 and that a t test is not appropriate. Test whether workers with automatic dispensers are significantly more productive (higher sales per hour).
Automatic Dispenser | Manual Dispenser |
---|---|
$153 | $105 |
128 | 118 |
143 | 129 |
110 | 114 |
152 | 125 |
168 | 117 |
144 | 106 |
137 | 92 |
118 | 126 |
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