Two independent samples of 100 mechanists and 90 carpenters are takento estimate the difference between the weekly wages of two categories of workers. Sample mean wage and variance of mechanist are 345 and 196 respectively. On the other hand sample mean wage and variance of carpenters are 340 and 204 respectively. Estimate at 95 percent confidence interval.
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the other hand sample mean wage and variance of carpenters are 340 and 204 respectively. ... the differencebetween the weekly wages of two categories of workers.
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