Select the correct answer.
2 answers:
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Answer:
The 90% confidence interval for the true proportion of all consumers who favor the design is (0.52, 0.59).
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 upper limit of this interval is:
The 90% confidence interval for the true proportion of all consumers who favor the design is (0.52, 0.59).
Answer:
A
C
D
Step-by-step explanation:
Given in the question an expression
We know that
here x = 3
y = 5
so
When exponent power rule is applied we can say that
because
3/5 = 3*(1/5)
Thirdly,