Answer:
Social influence model
Explanation:
The social influence model has its basis on the Social Learning Theory proposed by Bandura, which indicates that behavior comes from either positive or negative influences. Individuals that are part of the social sphere (such as parents and peers) and subjection to the media usually work as impact models, representing proper or improper behavior.
The correct awncer is D. The railroad expanded to Texas.
Answer:
1. Co-variance= -1.2
2. correlation coefficient= -0.4404
3. There is weak negative relationship between x and y.
Explanation:
1.
Co-variance= Cov(x,y)= sum[(x-xbar)(y-ybar)]/n
xbar=sumx/n=32/5=6.4
ybar=sumy/n=35/5=7
x 7 8 5 3 9
x-xbar 0.6 1.6 -1.4 -3.4 2.6
y 7 5 9 7 7
y-ybar 0 -2 2 0 0
(x-xbar)(y-ybar) 0 -3.2 -2.8 0 0
Cov(x,y)= sum[(x-xbar)(y-ybar)]/n=-6/5=-1.2
Cov(x,y)=-1.2
2.
correlation coefficient=r
![r=\frac{sum(x-xbar)(y-ybar)}{\sqrt{sum(x-xbar)^2sum(y-ybar)^2} }](https://tex.z-dn.net/?f=r%3D%5Cfrac%7Bsum%28x-xbar%29%28y-ybar%29%7D%7B%5Csqrt%7Bsum%28x-xbar%29%5E2sum%28y-ybar%29%5E2%7D%20%7D)
x 7 8 5 3 9
x-xbar 0.6 1.6 -1.4 -3.4 2.6
y 7 5 9 7 7
y-ybar 0 -2 2 0 0
(x-xbar)(y-ybar) 0 -3.2 -2.8 0 0
(x-xbar)² 0.36 2.56 1.96 11.56 6.76
(y-ybar)² 0 4 4 0 0
![r=\frac{-6}{\sqrt{23.2(8)} }](https://tex.z-dn.net/?f=r%3D%5Cfrac%7B-6%7D%7B%5Csqrt%7B23.2%288%29%7D%20%7D)
r=-0.4404
3. Since the value of correlation coefficient is negative and less than 0.5 , so, we can say that there is weak negative relationship between x and y.
It is caused by thermal conductivity