Question
Consider the following results for independent random samples taken from two populations. Sample 1 Sample 2 n 1 = 10 n 2 = 30 x
Consider the following results for independent random samples taken from two populations.
Sample 1 Sample 2
n 1 = 10 n 2 = 30
x 1 = 22.3 x 2 = 20.1
s 1 = 2.7 s 2 = 4.9
What is the point estimate of the difference between the two population means (to 1 decimal)?
What is the degrees of freedom for the t distribution (round down your answer to nearest whole number)?
At 95% confidence, what is the margin of error (to 1 decimal)?
What is the 95% confidence interval for the difference between the two population means (to 1 decimal)? If your answer is negative value, entre minus (-) sign. Use z-table.
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