Select all that apply.
2 answers:
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Answer:
Step-by-step explanation:
Combinatorial explanation:
The n balls have to be arranged in n positions and the only distinction is where are the black and where white balls are.
We can choose the position of black balls in ways, therefore, white ones are on the remaining positions.
Using binomial we can have explanation written below:
The balls can be arranged in n! possible permutations.
To be precise one particular arrangement includes permutations. Since r black balls can be permuted in r! ways and white balls in (n-r)! different orders.
So basically it yields,
permutations.
So the actual amount is,
Answer:
B) The margin of error is 0.0269.
C) The confidence interval is (0.5406, 0.5944).
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:
In the poll, n=918 and x=521 who said "yes."
This means that
90% confidence level
So , z is the value of Z that has a pvalue of
, so
.
B) Identify the value of the margin of error E.
The margin of error is 0.0269.
C) construct the confidence interval.
So
The confidence interval is (0.5406, 0.5944).