P-values
The state of CT claims that the average time on death row is 15 years. A random survey of 75 death row inmates revealed that the average length of time on death row is 16.6 years with a standard deviation of 6.3 years. Conduct a hypothesis to test the state of CT's claim.
t-test, two-tailed.
What's the p-value:
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 129 bars of Ivory soap. They find that 59 of them meet the 99.44% purity advertised.
z-test, left-tailed.
What's the p-value: