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.
Stromatolites are the most common precambrian fossil
Answer: Political action committees are formed by interest groups who want to help fund the campaign movement that they are dealing with.
Explanation:
The electorate will be more likely to have expanded knowledge of the electoral process is the major impact of daily involvement of media coverage on the newest polls.
<h3>What is Election?</h3>
Election is refer to a decision-making process by which a citizens or people decide and chooses a person or people's to occupy a public position or hold public office. Elections have been a common mechanism representative of democracy operate on since the 17th century.
Election involve a voting process in which people vote or choose their desire candidate.
<h3>Electorate </h3>
Electorate refer to population of people in a state or country that are eligible to vote. It is normally between a chosen age group.
Therefore, The electorate will be more likely to have expanded knowledge of the electoral process is the major impact of daily involvement of media coverage on the newest polls because media will give detailed information about the new polls.
Learn more about electorate from the link below.
brainly.com/question/699122
