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
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=-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.
Answer:
D
Explanation:
The map shows Michigan's forests. The Upper Peninsula, in particular, has an abundance of this natural resource, which helped earlier settlers prosper in the lumber industry. Although many forests are still found there, industrialization has led to a decrease in forests.
Sam Walton is a famous business man and entrepreneur most known for founding the retailer's Walmart and Sam's club.
Answer:
A
Explanation:
Citizenship is the status of a pe r son recognized under the custom or law is being a legal member of a sovereign state or belong to a nation.
Answer:
Empathy for them, because they intend to gain something
Explanation:
Research has found an answer to the question of whether people will help out-group and in-group members. People help their in-group members because of the feeling of empathy for them and out-group members because of what they stand to gain.
Individuals in a group feel more closely knitted together and hence feel more affected by the disadvantage of any of their member, thus they are more likely to help that member because of the feelings of empathy towards him, a hurt to one is a hurt to all. On the contrary, when people help individuals they are not in the same group with, they do so with the hope of getting something in return, maybe financial benefits or any other type of benefit.
