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.
Is the macroeconomic policy laid down by the central bank. it involves management of money supply and interest rate and is the demand side economic policy used by the government of a country to achieve macroeconomic objectives.
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Answer:
It would improve the player’s game.
Explanation:
It appears that motor imagery (MI) contributes to the enhancement of motor performance in athletes. Evidence suggests that directing the athlete's attention to the effects of movement on the environment is better than focusing on the action per se. In this case, the game of a tennis player is improved due to the fact that the player focuses on mental imagery.
I get my news from The TV and online. My grandparents get it from TV and the newspaper. I think it matters where you seek out informations because different sources have a bigger risk of spreading false information
The answer is logos. It is the appeal concerning
logical reason, therefore the speaker wants to present an argument that seems
to be comprehensive to the audience. It encompasses the content and point of
view of the speech. Like pathos and ethos the goal is to make a persuasive
outcome.