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.
It depends on the mindset and situation, odds are they won't be too excited at first. I was happy though.
The answer to this question is <span>environment
</span>the condition around our <span>environment will evoke our tendency to adapt and survive within the environment.
For example, people with lower economic bracket tend to be emotionally agressive compared to the upper one because without those agressive behavior, it would be really hard for them to survive.</span>
I believe it's because he knows that death is a force that <span>cannot be reckoned with and that regardless how hard we try, we cannot escape death.
(square toed shoes are the type of shoes which size couldn't be adjusted and changed by the wearer unlike a laced pair. This implicates the characteristic of death that is also cannot be changed)</span>
Answer: The percent of people with more then 65 that suffering dementia is around 5% and 8%.
The most common dementia is Alzheimer.
Alzheimer is a progressive neurodegenerative disease that manifests itself with short-term cognitive and memory impairment and a variety of neuropsychiatric symptoms and behavioral changes that worsen over time.
