Answer:
I don't know if I'm doing this 100% correctly but I would put:
four plus nine's total multiplied by 3
The area of the trapizoif is 97.5
Answer:
The required sample size for the new study is 801.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The margin of error is:
25% of all adults had used the Internet for such a purpose
This means that
95% confidence level
So , z is the value of Z that has a pvalue of , so .
What is the required sample size for the new study?
This is n for which M = 0.03. So
Rounding up:
The required sample size for the new study is 801.
I do believe it is 12 as well considering the fact that it's negative three and not positive. If it was a positive three then maybe it would be 18.
Answer: 14/35, -32\40, -1
Step-by-step explanation: