1.40 points Scientists are take measurements of the amount of nitrogen in different lake cores.From Lake A, they take five cores and measure {14.3, 12.35, 16.25, 12.5, 9.9} ppm. From Lake B,they take three cores and measure {15.6, 14.8, 13.9} ppm. Use a 5% significance level. a) 20 points Is the average nitrogen measurement in Lake B higher than in Lake A? Is there a significant difference in variance from the measurements of the two lakes?

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