A local college requires an English composition course for all freshmen. This year they are evaluating a
Question:
For the general population of freshmen who took the traditional lecture class, the exam scores form a normal distribution with a mean of µ = 80.
a. If the final exam scores for the population have a standard deviation of s = 12, does the sample provide enough evidence to conclude that the new online course is significantly different from the traditional class? Assume a two-tailed test with a = .05.
b. If the population standard deviation is s = 6, is the sample sufficient to demonstrate a significant difference? Again, assume a two-tailed test with a = .05.
c. Comparing your answers for parts a and b, explain how the magnitude of the standard deviation influences the outcome of a hypothesis test.
Distribution
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Related Book For
Essentials Of Statistics For The Behavioral Sciences
ISBN: 9781133956570
8th Edition
Authors: Frederick J Gravetter, Larry B. Wallnau
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