Question
The following data represent the Woodward Academy Upper School enrollment over the past 35 years 1965 1970 1975 1980 1985 1990 1995 2000 650 690
The following data represent the Woodward Academy Upper School enrollment over the past 35 years
1965 | 1970 | 1975 | 1980 | 1985 | 1990 | 1995 | 2000 |
650 | 690 | 740 | 790 | 840 | 900 | 960 | 1025 |
Which of the following statements is true?
(a) The scatter plot appears relatively linear. The linear fit produces a clear pattern in the residual plot so a transformation is needed.
(b) The plot of x, log y is even more linear.
(c) log y = 2.7836 + .0057x This also produces an r = .9999 and a better residual plot (less pattern). This predicts enrollment given years since 1960.
(d) log y = 2.7836 + .0057 (50) so log y = 3.0686 and the enrollment would be 1171 students.
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