Question

In a test of corrosion resistance, a sample of 64 Incoloy steel specimens were immersed in acidified brine for 4 hours, after which each specimen had developed a number of corrosive pits. The maximum pit depth was measured for each specimen. The mean depth was 850 ?m with a standard deviation of 153 ?m. The specification is that the population mean depth ? is less than 900 ?m. The P-value calculated for testing H0 : ? ? 900 versus H1 : ? < 900 is a small probability; hence, it is plausible that the mean depth is greater than or equal to 900 ?m. True or False True False

          In a test of corrosion resistance, a sample of 64 Incoloy steel specimens were immersed in acidified brine for 4 hours, after which each specimen had developed a number of corrosive pits. The maximum pit depth was measured for each specimen. The mean depth was 850 ?m with a standard deviation of 153 ?m. The specification is that the population mean depth ? is less than 900 ?m.

The P-value calculated for testing H0 : ? ? 900 versus H1 : ? < 900 is a small probability; hence, it is plausible that the mean depth is greater than or equal to 900 ?m.

True or False

True

False

In a test of corrosion resistance, a sample of 64 Incoloy steel specimens were immersed in acidified brine for 4 hours, after which each specimen had developed a number of corrosive pits. The maximum pit depth was measured for each specimen. The mean depth was 850 ?m with a standard deviation of 153 ?m. The specification is that the population mean depth ? is less than 900 ?m.

The P-value calculated for testing H0 : ? ? 900 versus H1 : ? < 900 is a small probability; hence, it is plausible that the mean depth is greater than or equal to 900 ?m.

True or False

True

False

Added by Dawn J.

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