Answer:
Predictive validity.
Explanation:
A Predictive validity test is the test that is taken to predict the future performance of the applicant based on the scores in the test. The test is useful in predicting the future, as suggested by the name.
The tests that are taken before allowing a person in any organisation are often predictive. A pre-employment test is such example.
<u>In the given case, the entrance exams are also an example of predictive validity. It is because based on the scores scored by a student will help the university authorities about the performance of the student</u>.
So, the correct answer is predictive validity.
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:
Joe Biden
Explanation:
Joe Biden Is in the lead in Nevada and he is gaining ground in Pennsylvania and Georgia. He only needs to win one more state to be president while Trump has to win all the states that remain. Joe Biden just has a bigger chance of winning.
Answer:
C
Explanation:
It mentions the freedom of the press
Answer: Experimental
Explanation:
An experimental research would be needed to prove if the hypothesis that "the presence of certain odors causes people to gamble more" is correct or not.
An experiment is a process carried out in a scientific method to prove if a hypothesis is correct or not.
