Perhaps look at the problem as follows:
The random variable (X) is the percentage of total revenue that is attributed to the "drive-thru."
Then this variable can be considered to be continuous with a range of [0 , 1].
You have a sample of 50 (randomly chosen?) days, and compute the value of X for each of the 50 days.
Next test
Ho: mu = 0.75
H1: mu not = 0.75
where mu represents the mean percentage of total revenue that is attributed to the "drive-thru."
Howard Kaplon
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| Howard S. Kaplon | Department of Mathematics |
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variable
-----Original Message-----
From: burt [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 24, 2004 10:53 AM
To: [EMAIL PROTECTED]
Subject: [edstat] question on hypothesis testing
How would you test the following hypothesis:
A fast-food restaurant claims that 75% of their revenue is from the "drive-thru". Suppose you have 50 days of receipts from the restaurant. Each days' receipt shows the total revenue and the "drive-thru" revenue for that day. I'm in a quandary as to how one would conduct this test. The two revenues are obviously dependent under the null hyp; thus it's not just a simple test of comparing two means from independent samples.(Even if the samples were independent, I'm not sure how to do it-because of the 75% factor in the hyp. This is a moot point ,though, since the samples are clearly dependent to start with) Thanks for any help. . . =================================================================
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