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:
the facial feedback effect
Explanation:
The facial feedback effect refers to the impact of facial expressions on the emotional state of the individual. Also, forced expressions tend to make people more uncomfortable and unhappy even if they are being forced to smile like on social gatherings. Here, it is said that 'most recent participants reported feeling more happy than sad after rubberbands secured to the sides of their faces were stretched over the tops of their heads'. Hence, this is clearly the facial feedback effect as it highlights the impact of facial expressions on the emotional state of the participants.
The United States Supreme Court cases accept most cases by a writ of certiorari.
The strongest predictor of task performance in a workplace would be the Spatial Intelligence. Spatial Intelligence is one of the area of multiple intelligence dealing with the spatial judgement that provides the ability to fix problems and would create products that have value in a specific culture.
Answer:
In primary elections, party members vote in a state election for the candidate they want to represent them in the general election. After primary elections, each major party, Democrat and Republican, hold a national convention to select a presidential nominee. On election day, people in every state cast their vote. 15% of voters vote for the candidate in the opposing party.
Explanation:
