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.
The steel industry benefitted the most from the Bessemer Process.
The Bessemer Process is an industrial process that was the first inexpensive option in mass steel production. This process was named after Henry Bessemer, who took out a patent in 1856.
Answer:C. Andrew Jackson was labeled a murderer.
Explanation:The presidential campaign of 1828 led to the election of the eleventh presidential election of the United States of America since it stated the four year electioneering cycle.
It was seen by many as a re-play of the 1824 election the election featured two main aspirants which includes, President John Quincy Adams of the National Republican Party and Andrew Jackson of the Democratic Party, the election was won by Andrew Jackson.
DURING THE CAMPAIGNS THAT LED TO THE ELECTION PRESIDENT ANDREW JACKSON WAS LABELLED AS A MURDERER.
Answer:
All forms of life and society needs energy
Plants use sun for energy
Wind power
Solar energy
Biofuel
Maslow's hierarchy of needs is a theory in psychology that argues that the human needs are organized in a hierarchy, having to be fulfilled on a crescent level, a lower level must be completely satisfied and fulfilled before moving onto a higher pursuit.
The five levels are Physiological needs; Safety Needs, Social belonging; Self-Esteem and Self-actualization.
Thus, Self-actualization is the highest level, being summarized in the sentence: "What a man can be, he must be."
