Data for the number of property crimes (C) committed in a given
state for randomly selected years from 2000 to 2009 are provided.
The linear model for the data is C = -11.83 Y + 24,122.90, with a
correlation coefficient of r = -0.98.
Predict the number of property crimes in 2018 and indicate
whether your result is reliable and why.
Year (Y)
Crimes
(C, in 1000s)
2000
481
2002
444
2003
430
2005
404
2006
394
2009
374
A. 1869 thousand; but it is not reliable because the model was
built on data from 2000 to 2009 and 2018 is not in that range. We
are extrapolating.
B. 250 thousand; it is reliable because the correlation
coefficient is near -1.
C. 1869 thousand; it is reliable because the correlation
coefficient is near -1.
D. 250 thousand; but it is not reliable because the model was
built on data from 2000 to 2009 and 2018 is not in that range. We
are extrapolating.