Consider the following results for independent random samples taken from two populations. Sample 1Sample 2n 1 = 20n 2 = 40x 1 = 22.4x 2 = 20.7s 1 = 2.2s 2 = 4.7 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)? Use z-table. If your answer is negative value, entre minus (-) sign.(, )

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Consider the following results for independent random samples taken from two populations.

Sample 1Sample 2
n 1 = 20n 2 = 40
x 1 = 22.4x 2 = 20.7
s 1 = 2.2
s 2 = 4.7

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)? Use z-table. If your answer is negative value, entre minus (-) sign.
(
,
)

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