Identify the correlation coefficient, and explain its meaning to the solution of this problem. Then, solve the problem. Car weight and fuel consumption. Find the best predicted highway fuel consumption amount (in mi/gal) for a car that weighs 3000lb. weight fuel consumption 3175 27 3450 29 3225 27 3985 24 2440 37 2500 34 2290 37
2006-10-09 10:18:45 · 4 answers · asked by lostinmath 1 in Science & Mathematics ➔ Mathematics
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2006-10-09 10:20:11 · answer #1 · answered by Anonymous · 0⤊ 2⤋
Correlation coefficient:
r = sum i=1 to n (w(i)-mw)(c(i)-mc) / ((n-1)*sw*sc)
w(i)=ith weight
c(i)=ith consumption
mw=mean wt
mc=mean consumption
sw=std deviation of wt
sc=std deviation of consumption
n=number of samples
Then, predicted consumption for w=3000 is
c = sc*zc+mc
where zc=zw*r, and zw=(3000-mw)/sw.
2006-10-09 10:31:29 · answer #2 · answered by James L 5 · 0⤊ 0⤋
30.62 mpg
2006-10-09 10:25:57 · answer #3 · answered by Anonymous · 0⤊ 0⤋
yellow?
2006-10-09 10:26:14 · answer #4 · answered by Anonymous · 1⤊ 0⤋