statistics
posted by mina .
Select the TWO options that are TRUE statements about twosample ttests.
Select one or more:
The same formula is used for the ESE (estimated standard error) in the twosample ttest with a common variance and the twosample ttest with unequal variances.
A researcher has collected two samples of data and the sample variances are 1.45 and 2.11. It would not be appropriate to use the twosample ttest with a common variance.
A researcher has collected two samples of data and the sample variances are 2.16² and 4.82². It would not be appropriate to use the twosample ttest with a common variance.
The twosample ttest with unequal variances has, as its null hypothesis, that the means of the two populations involved are the same.
It is not possible to find a confidence interval for the difference between two means based on the two sample ttest with unequal variances.
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