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A random sample of 50 water canteens of soldiers in a desert region show an average life of 4.34 years with a sample standard deviation

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A random sample of 50 water canteens of soldiers in a desert region show an average life of 4.34 years with a sample standard deviation of 1.93 years. Army experience is such that canteens are known to have an average life of 4.90 years. Test the hypothesis Ho : p > 4.3 at the 5% significance level

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