The article Cost-Effectiveness in Public Education (Chance [1995]: 3841) reported that, for a sample of n =
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The article “Cost-Effectiveness in Public Education” (Chance [1995]: 38–41) reported that, for a sample of n = 44 New Jersey school districts, a regression of y = average SAT score on x = expenditure per pupil (thousands of dollars) gave b = 15.0 and sb = 5.3.
a. Does the simple linear regression model specify a useful relationship between x and y?
b. Calculate and interpret a confidence interval for β based on a 95% confidence level.
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Introduction To Statistics And Data Analysis
ISBN: 9780495118732
3rd Edition
Authors: Roxy Peck, Chris Olsen, Jay L. Devore
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