Question: In 2001 23 of American university undergraduate students had at
In 2001, 23% of American university undergraduate students had at least one tattoo. A health practitioner suspects that the percent has changed since then. She obtains a random sample of 1026 university undergraduates and ﬁnds that 254 have at least one tattoo. Is this sufﬁcient evidence to conclude that the proportion is different from 0.23 at the α = 0.1 level of signiﬁcance?
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