Need help math 8th grade
2 answers:
You might be interested in
Answer:
The limits are 0.6472 and 0.7528
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 .
Of the 500 surveyed, 350 said they would vote for the Democratic incumbent.
This means that
99% confidence level
So , z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:
The upper limit of this interval is:
The limits are 0.6472 and 0.7528