Help me please I need to know the answer to this question in under an hour :-)
2 answers:
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- Set up
- Get all fractions to a common denominator which will allow you to subtract them
- Subtract numerators
- Simplify
Just work with it as seperate triangles and then add them up.
Answer:
The lower bound for a 90% confidence interval is 0.2033.
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 .
For this problem, we have that:
90% confidence level
So , z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:
The lower bound for a 90% confidence interval is 0.2033.