APFIVE Degrees of Freedom and Variance Assumption
Researchers compared recovery times for two surgical techniques with sample sizes of 65 and 70, and standard deviations of 12.3 days and 9.8 days, respectively. If the calculated degrees of freedom (df) is 123.82, what can be concluded about the population variances?
A
They are approximately equal
B
They are likely unequal
C
The first population has smaller variance
D
Nothing can be concluded about the variances
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