Answer:
a. 1.44
Step-by-step explanation:
We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 40%.
At the null hypothesis, it is tested if the proportion is of at most 40%, that is:

At the alternative hypothesis, it is tested if the proportion is of more than 40%, 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.
0.4 is tested at the null hypothesis:
This means that 
A random sample of 200 people was taken. 90 of the people in the sample favored Candidate A.
This means that:

Value of the test statistic:



Thus the correct answer is given by option a.
First do 6×8=48, then just add the 0's to the end to get 480,000
Answer is d. -5/3 because y2-y1 =x2-x1
1. 0
2. 32.6
3. 326
4. 3260
considering i’m not the best at maths, can someone check these for me?
Answer:
n = 12.3
Step-by-step explanation:
No prob