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The following information was obtained from independent random samples. The Degrees of Freedom have be calculated...

The following information was obtained from independent random samples. The Degrees of Freedom have be calculated to be 19. The Standard Deviations are Unknown.
Small Sample Size: Use t-value
Sample 1 Sample 2
Sample Mean 45 42
Sample Variance 85 90
Sample Standard Deviation
Sample Size 10 12
Standard Error
Confidence Coefficient 0.95
Level of Significance
Degrees of Freedom 19
t-value
Margin of Error
Point Estimate of Difference 3
Lower Limit
Upper Limit
The point estimate for the difference between the means of the two populations is:
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