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Need help to solve this one pls?? From two normally distributed populations, two independent samples are selected with the following information: m = 650, x

Need help to solve this one pls??

From two normally distributed populations, two independent samples are selected with the following information: m = 650, x = 1.05,01 = 5.22 1, = 675. X, = 1.54,0, = 6.80 Test at 5% significance level if /4 is less than /4

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