Step-by-step explanation:
The given inequality is
Subtract 10 from both sides
Divide both sides by 5 to get:
We draw a closed circle at 5 and draw the arrow to the left.
See it in the attachment.
1/8 O 0.1 A. = B. > C. < D. none of the above
1 answer:
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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).