A random sample of 50 recent college graduates results in a mean time to graduate of
Chapter 9, Problem 6(choose chapter or problem)
A random sample of 50 recent college graduates results in a mean time to graduate of 4.58 years, with a standard deviation of 1.10 years. Source: Based on data from The Toolbox Revisited by Clifford Adelman, U.S. Department of Education (a) Compute and interpret a 90% confidence interval for time to graduate with a bachelors degree. (b) Does this evidence contradict the widely held belief that it takes 4 years to complete a bachelors degree? Why?
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