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An interactive poll found that 318 of 2,308 adults aged 18 or older have at least...

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Statistics

An interactive poll found that 318 of 2,308 adults aged 18 orolder have at least one tattoo.

​(a) Obtain a point estimate for the proportion of adults whohave at least one tattoo.

​(b) Construct a 90% confidence interval for the proportion ofadults with at least one tattoo.

(c) Construct a 98% confidence interval for the proportion ofadults with at least one tattoo.

​(d) What is the effect of increasing the level of confidence onthe width of the​ interval?

Answer & Explanation Solved by verified expert
3.8 Ratings (744 Votes)
Solution Given thatn 2308x 318a x n 318 2308 01381 1 0138 0862bAt 90 confidence level the z is 1 90 1 090 010 2 010    See Answer
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