Answered: survey asked, "How many tattoos do you…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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Question

A survey asked, "How many tattoos do you currently have on your body?" Of the

1211

malessurveyed,

185

responded that they had at least one tattoo. Of the

1009

females surveyed,

131

responded that they had at least one tattoo. Construct a

99%

confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval.

Let

represent the proportion of males with tattoos and

represent the proportion of females with tattoos. Find the

99%o

confidence interval for

p1−p2.

Find upper bound:

find lower bound:

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