statistics
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A random sample of 10 observations is selected from the first normal population and 8 from the second normal population. For the hypothesis, H0: ¦Ì1 ¡Ü ¦Ì2, (.01 significance level), what is (are) the critical value(s)? (Population standard deviations are unknown).

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A random sample of 10 observations is selected from the first normal population and 8 from the second normal population. For the hypothesis, H0: ¦Ì1 ¡Ü ¦Ì2, (.01 significance level), what is (are) the critical value(s)? (Population standard deviations are unknown
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