Answer:
The test statistic is 
Step-by-step explanation:
We are interested in determining whether or not the proportion of the student who experience anxiety during the exam is significantly more than 80%.
At the null hypothesis, we test if the proportion is 80%, that is:

At the alternate hypothesis, we test if the proportion is more than 80%, that is:

The test statistic is:

In which X is the sample mean,
is the value tested at the null hypothesis,
is the standard deviation and n is the size of the sample.
80% is tested at the null hypothesis:
This means that 
A random sample of 100 students was taken. Eighty-five of the student in the sample experienced anxiety during the exam.
This means that 
The test statistic is



The test statistic is 
The answer is 16 because 16•5=80 and then 80-9=71 yk?
Answer:
(y-5)(y+7)
Step-by-step explanation:
Here you go! Hope this helps!
Answer:
9/10 would be $1.80
2 would be $2.90
3 and 1/10 would be $4
10 would be $10.90
Step-by-step explanation:
Youre welcome bud im not sure how to explain tho