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a random sample of 36 measurements from a population with standard deviation 3 had a sample mean 15. An independent random sample of 56 measurements

a random sample of 36 measurements from a population with standard deviation 3 had a sample mean 15. An independent random sample of 56 measurements from a second population standard deviation 5 had a sample mean of 11. Test the claim that the population mean of the first population exceeds that of second. Use 1% level of significant.

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