AriesDaWolf
22.03.2021 •
Mathematics
The calculator screen shows the linear regression for the data in the table
What type of correlation does the correlation coefficient indicate?
LinReg
y = ax+b
a= -1.96341463
b = 19.09756098
r2 = .9817073171
r =-.9908114438
х 1 3 4 5 6 8 9
y 17 12 12 10 8 3 1
options:
a: a strong positive correlation
b: a weak positive correlation
c: a strong negative correlation
d: a weak negative correlation
Solved
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Ответ:
c = 180- (70+52) = 58
a/sina = c/sinc
c = a sinc/sina
c = (640 x sin58)/sin 70 = 572