Posted by Rachel | Posted in Coffee and Accessories | Posted on 24-04-2010
Tags: coffee, cool, doppio, espresso, marketing
what is the Dependent and independent variable ?
Studies have shown that drawing a smiling face on a restaurant bill may increase the percentage of tip left for food servers. 2 people wanted to see whether something similar might take place in a coffee bar if the barman drew a sun on the coffee bill. They conducted and experiment in local coffee bars with clients that ordered an espresso coffee and measured the frequency and amount of tips left the barman. The data showed that when a sun was drawn in the coffee bill, clients left a tip more frequently and the tips were higher than when the sun was not drawn on the bill.
1. what is independent and dependent variables?
2. did data come from population or sample?
How would i know if its from population or sample? Thanks so much for helping
The independent variable is placing the sun or not on the coffee bill.
The dependent variable(s) are the frequency of tips and increased amounts for the tips
The data came from a sample (those ordering espresso in a particular shop)
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