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Mathematics, 20.01.2020 17:31 punkee5375
An investor believes that investing in domestic and international stocks will give a difference in the mean rate of return. they take two random samples of 15 months over the past 30 years and find the following rates of return from a selection of domestic (group 1) and international (group 2) investments. can they conclude that there is a difference at the 0.10 level of significance? assume the data is normally distributed with unequal variances. use a confidence interval method. round to 3 decimal places. average group 1 = 2.0233, sd group 1 = 4.893387, n1 = 15 average group 2 = 3.048, sd group 2 = 5.12399, n2 = 15
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