Proctor & Gamble claims that at least half the bars of Ivory
soap they produce are 99.44% pure (or more pure) as advertised.
Unilever, one of Proctor & Gamble’s competitors, wishes to put
this claim to the test. They sample the purity of 146 bars of Ivory
soap. They find that 72 of them meet the 99.44% purity advertised.
What type of test should be run? z-test of a proportion t-test of a
mean The alternative hypothesis indicates a two-tailed test
right-tailed test left-tailed test Calculate the p-value. Does
Unilever have sufficient evidence to reject Proctor & Gamble’s
claim? No Yes
