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:
Democratic President Barack Obama
Explanation:
Democratic President Barack Obama won election to a second term, though the Republican Party retained control of the House of Representatives. Obama defeated Republican nominee Mitt Romney to win a second term, taking 51.1 percent of the popular vote and 332 of the 538 electoral votes.
Answer:
Amusement parks, penny arcades, dance halls, and other commercial amusements flourished. As early as 1910, when there were 10,000 movie theaters, the movies had become the nation's most popular form of commercial entertainment.
The correct answer is: Sample.
<u>A sample is the group of people, drawn from the accessible population, that is interviewed for a study to represent the entire population (or just a target population) in a research. </u>The selection of these individuals can occur through different sampling methods such as random sampling, stratified sampling, opportunity sampling and systematic sampling.
Answer:
Foreign Corrupt Practices
Explanation:
A highly powerful foreign government official approaches your company and requests a large sum of money. In return for this bribe, he promises your company will receive preferential treatment in all future government contracts. You quickly refuse his request, explaining that the <u>Foreign Corrupt Practices</u> Act of the United States prohibits you from making such payments
.
The Foreign Corrupt Practices Acts which was passed in 1977 prohibits United States citizens or businesses from bribing foreign officials in order to promote or benefit their business interests.
