A researcher is interested in testing whether, on average, College X graduates' earnings differ from those of College Y graduates who work in similar jobs and have similar characteristics. Using a matched pairs design that controls for all relevant characteristics, she finds that a 95% confidence interval for μCollegeX¯ μCollegeY is between -250 TL and 2500 TL . If the number of pairs chosen is 10, what can she conclude? A ) She can be 95% confident that there is a significant difference in the mean earnings between College X and College Y graduates. B ) She cannot be 99% confident that there is a significant difference in the mean earnings between College X and College Y graduates. C ) She can be 98% confident that there is a significant difference in the mean earnings between College X and College Y graduates. D ) She cannot be 80% confident that there is a significant difference in the mean earnings between College X and College Y graduates. E ) She cannot be 90% confident that there is a significant difference in the mean earnings between College X and College Y graduates.
A researcher is interested in testing whether, on average, College X graduates' earnings differ from those of College Y graduates who work in similar jobs and have similar characteristics. Using a matched pairs design that controls for all relevant characteristics, she finds that a 95% confidence interval for μCollegeX¯ μCollegeY is between -250 TL and 2500 TL . If the number of pairs chosen is 10, what can she conclude?
A ) She can be 95% confident that there is a significant difference in the
B ) She cannot be 99% confident that there is a significant difference in the mean earnings between College X and College Y graduates.
C ) She can be 98% confident that there is a significant difference in the mean earnings between College X and College Y graduates.
D ) She cannot be 80% confident that there is a significant difference in the mean earnings between College X and College Y graduates.
E ) She cannot be 90% confident that there is a significant difference in the mean earnings between College X and College Y graduates.
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