Question
An interactive poll found that 334 of 2,302 adults aged 18 or older have at least...
An interactive poll found that 334 of 2,302 adults aged 18 or older have at least one tattoo.
(a) Obtain a point estimate for the proportion of adults who have at least one tattoo.
(b) Construct a 95% confidence interval for the proportion of adults with at least one tattoo.
A. Lower bound: ______
Upper bound: _____
(Round to three decimal places as needed.)
B. The requirements for constructing a confidence interval are not satisfied.
(c) Construct a 99% confidence interval for the proportion of adults with at least one tattoo.
A. Lower bound: _____
Upper bound: ______
(Round to three decimal places as needed.)
B. The requirements for constructing a confidence interval are not satisfied.
(d) What is the effect of increasing the level of confidence in the width of the interval?
(d) Choose the correct answer below.
A. Increasing the level of confidence widens the interval.
B. Increasing the level of confidence narrows the interval.
C. Increasing the level of confidence has no effect on the interval.
D. It is not possible to tell the effect of increasing the level of confidence in the width of the interval since the requirements for constructing a confidence interval in parts (b) and (c) were not met.
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