Scale Lab
June 15th, 2010
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What assumptions are necessary for this test to be satisfied?
The business college computing center wants to determine the proportion of business students who have personal computers (PC’s) at home. If the proportion exceeds 30%, then the lab will scale back a proposed enlargement of its facilities. Suppose 250 business students were randomly sampled and 65 have PC’s at home. What assumptions are necessary for this test to be satisfied?
A) The population has an approximately normal distribution.
B) The sample variance equals the population variance.
C) The sample mean equals the population mean.
D) None of the above are necessary.
B) The sample variance equals the population variance
It means that the distributions of PCs of the students in the test is similar to the distribution in the general population. If that assumption is not taken then the test is pointless
scale box by tresB lab.
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