Question
MATH - STATISTICS: Problem 2 A researcher wishes to test the claim that the average cost of tuition and fees at a 4-year college at
MATH - STATISTICS: Problem 2
A researcher wishes to test the claim that the average cost of tuition and fees at a 4-year college at least $7000.She selects a random sample of 81 colleges and finds the mean to be $6900.The standard deviation is $500.
a. Is there evidence to support the claim at = .06?
b. Suppose no claim was made but the researcher is thinking of making a claim using a 95% two-sided confidence interval.Using the same data, construct the CIE interval.
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A Survey of Mathematics with Applications
Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde
10th edition
134112105, 134112342, 9780134112343, 9780134112268, 134112261, 978-0134112107
