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 
Answer: y=4x-7
Step-by-step explanation:
1.= 1
2.= -15
3.= -18
4.= -1
5. = -11
6. = 22
Answer:
5(-2w)-(5x4)
Step-by-step explanation:
Answer:
$45
Step-by-step explanation:
3/4×60= 45
cost of jacket in sale: $45
hope it helps!