The following results are for independent random samples taken from two populations. Suppose that we want to provide a 95% confidence interval for the difference between the two population means....


The following results are for independent random samples taken<br>from two populations. Suppose that we want to provide a 95%<br>confidence interval for the difference between the two population<br>means.<br>Sample 1<br>Sample 2<br>n1 = 20<br>n2 = 30<br>X1 = 22.5<br>= 20.1<br>S1 = 2.5<br>S2 = 4.8<br>(a) What is the point estimate of the difference between the two<br>population means?<br>(b) What is the degrees of freedom for the t distribution?<br>(c) At 95% confidence, what is the margin of error?<br>

Extracted text: The following results are for independent random samples taken from two populations. Suppose that we want to provide a 95% confidence interval for the difference between the two population means. Sample 1 Sample 2 n1 = 20 n2 = 30 X1 = 22.5 = 20.1 S1 = 2.5 S2 = 4.8 (a) What is the point estimate of the difference between the two population means? (b) What is the degrees of freedom for the t distribution? (c) At 95% confidence, what is the margin of error?

Jun 02, 2022
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