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 70 of them meet the 99.44% purity advertised. What type of test should be run?

t-test of a mean

z-test of a proportion

The alternative hypothesis indicates a

right-tailed test

two-tailed test

left-tailed test

Calculate the p-value.

Does Unilever have sufficient evidence to reject Proctor & Gamble's claim?

No

Yes