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: Smith—permissive; Jones—authoritarian; Johnson—rejecting-neglecting
Explanation: The Smith's are lenient. They don't expect much from their children but they shower all the love and care for their children. This is an example of permissive parenting.
The Jones's are authoritarian. This is just an opposite of permissive parenting. They expect much but show less care.
The Johnson's are rejecting-neglecting. They don't expect anything from the kids and they don't care either.
<span>The Kingdom of Aksum or Axum, also known as the Aksumite Empire, was a ....it had begun minting its own currency and was named by Mani as one of the four ....rise of the Aksumite kingdom at the beginning of the Common Era and conversion .</span>
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I believe the answer is: <span>Athenian participatory democracy
</span><span>Athenian participatory democracy is a system of direct democracy where people could directly vote for the regulations that must be imposed in the society.
This is different from current type of democracy where people could only vote for the representatives</span>
It is a small area with a liable water supply in the vast desert
