The following table gives the national average pupil-teacher ratio in public schools over selected years. (a) Find
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The following table gives the national average pupil-teacher ratio in public schools over selected years.
(a) Find the equation for the least squares line. Let x correspond to the number of years since 1990 and let y correspond to the average number of pupils per teacher.
(b) Use your answer from part (a) to predict the pupil-teacher ratio in 2025. Does this seem realistic?
(c) Calculate and interpret the correlation coefficient.
Transcribed Image Text:
Year 1995 1999 2003 2007 2011 2015 Ratio 17.8 16.6 16.4 15.7 16.3 16.2
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a b The year 2025 corresponds to x 35 Y 00685735 1753 151 I...View the full answer
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