Comparing the means of two population

Reference no: EM1320963

Compare the means of two populations using 96% confidence interval:

In order to compare the means of two populations, independent random samples of 484 observations are selected from each population, with the following results:

Sample 1	Sample 2
xi	x₂
st = 105	s₂ = 165

(a) Use a 96 % confidence interval to estimate the difference between the population means (mean 1 - mean 2)

(b) Test the null hypothesis: Ho: (mean 1 - mean 2) = 0 versus the alternative hypothesis: H_a : mean 1 - mean 2) is not equal to 0. Using alpha = 0.04, give the following:

1. the test statistic z=

2. the positive critical z score the negative critical z score: Test the null hypothesis: Ho: (mean 1 - mean 2) = 21 versus the alternative hypothesis: Ha: (mean 1 - mean 2) not equal to 21. Using alpha = 0.04, give the following.

the test statistic
the positive critical z score
the negative critical z score

Reference no: EM1320963

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