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.
Battle of Lexington by François Godefroy 1775
The Battles of Lexington and Concord in Massachusetts were the first battle between American Minutemen and the British army. It was an American victory that forced a British widthdrawal from the countryside back to Boston.
Explanation:
Provide public goods
Provide merit ( education )
Reduce inequality and provoty through taxes
Regulation can protect workers at work
Gives cover for health insurance
Answer:
Molotov cocktail
Explanation:
It's also known as petrol bomb, bottle bomb or poor man's grenade, among other names.
It was invented in the late 1930s.
Its name doesn't come from the inventor or from a drink's name. It was named that way Finns as an insult to a Russian minister (Vyacheslav Molotov) who was not really liked by the Finns.
It's been used then for almost a century mostly by protesters, but also during war times.
Answer:
Carl's Perkings Act
Explanation:
The answer is Perkings Act.
This act is named after Carl D. Perkins. This acts helps students and people to study technical courses and increase their knowledge. By allowing the deprived people to study and practice technical things, they will help to strengthen the United States economy.
The full name of this act is Carl D. Perkins Vocational and Technical Education Act. The Federal government of the States authorized this act in the year 1984.
This act ensures access to vocational assessment, counseling, and placement of the disenfranchised groups.
Thus the answer is ---
Carl's Perkings Act
