SB standard error of the mean

SB standard error of the mean - STANDARD ERROR OF THE MEAN...

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STANDARD ERROR OF THE MEAN (COMPARING RESULTS FROM DIFFERENT EXPERIMENTAL CONDITIONS) Standard error of the mean allows comparisons to be made between two or more groups that are not linked. Through standard error of the mean, the experimenter is able to see if the difference between two groups is significant or if they are close enough to treat them as equal. Consider the example of graduating students. Administrators at Brigham Young University were concerned that students were taking longer to complete their degrees than other comparable universities. After making a few calls, they collected the following data: BYU Comparable Schools* Average years to graduate** 4.7 4.4 Number of students used for survey 452 974 Standard Deviation 1.21 years 2.57 years * Including students from Harvard, Yale, Princeton, and UVSC. ** Includes only time during which students were enrolled in classes. What question is being asked in this experiment? Do students at BYU take longer to graduate than other comparable schools? What control, if any, is being used in this experiment? The general category of “comparable schools” serves as a negative control.
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SB standard error of the mean - STANDARD ERROR OF THE MEAN...

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