Comparing Confidence Interval Margins of Error
To compare two teaching methods, independent random samples were taken, yielding the following statistics: n₁ = 22, s₁ = 12, and n₂ = 25, s₂ = 15. The margin of error for a 99% confidence interval for the difference in mean scores is larger than the margin of error for a 95% confidence interval by approximately what factor?
A
1.04
B
2.58
C
4.00
D
1.33
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