An interactive poll found that 349 of 2,336 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.

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

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

a) 0.149

b) (0.135,0.163)

c) (0.134,0.164)        

Step-by-step explanation:

We are given the following in the question:

a) Sample size, n = 2336

Number of people that have at least one tattoo, x = 349

Point Estimate:

b) 95% confidence interval:

Putting the values, we get:

c) 98% confidence interval

Putting the values, we get:

d) With increase in confidence level, the width of the confidence interval increases.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

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