Answer to Question #28907 in Statistics and Probability for Marie
And the difference exists in two cases:
- undergraduate students spend more time praying eachday than graduate students
- graduate students spend more time praying each daythan undergraduate students
So, the difference d between times spent praying each dayfor undergraduate students and graduate students can be < 0 or > 0 for
the difference to exist.
Thus professor should use two-tailed test.
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