At the end of an average twelve hour day, how many cans of soda will the vending machine have dispensed?
The soda machine outside the lecture hall sees a steady stream of customers throughout the day. While the machine takes 4 seconds to deliver a can of carbonated sugar water once the button is pressed, the student customers introduce variation into the delivery process by pondering their selection for a while. Thus, we can safely say that the service time is governed by a negative exponential probability distribution that averages 10 seconds. Over the course of a twelve hour lecture day, students arrive at the rate of 240 per hour, Poisson distributed of course.
A) 4320
B) 3600
C) 3240
D) 2880
Answer: D
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Indicate whether the statement is true or false
Which of the following is NOT an advantage of using depth interviews compared to using focus groups in marketing research?
A) Depth interviews can uncover deeper insights than focus groups. B) Depth interviews result in a free exchange of information that may not be possible in focus groups. C) Depth interviews attribute the responses directly to the respondent, unlike focus groups, where it is often difficult to determine which respondent made a particular response. D) With probing, it is possible to get at the real issue when topics are complex. E) Skilled depth interviewers are inexpensive and easy to find compared to focus group moderators.