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Unformatted text preview: ppose that we are given
a sample Y1 , . . . , Y10 � N (µy , αx ) from a distribution with the same variance
as X s, i.e. αx = αy , but possibly diﬀerent mean µy . Suppose that
µy = Y = 2.8, αy = Y 2 − Y 2 = 0.37.
Find a 90% conﬁdence interval for µx − µy .
(6) For samples in problems (4) and (5), perform the t-test of the hyp oth
esis that µx � µy under the assumption of equal variances. Test whether the
variances are equal using the F-test. In both tests,...
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- Spring '09