Is the mean score for each teacher the best measure of central tendency to confirm whether or not there is inconsistency with the marking of essays among teachers? All other things being constant, which of the four (4) teachers would you say is the most consistent regarding the grading of the essays? Give one reason.
Many students at popular school in Timbuktu have been complaining that there seems
to be some level of inconsistency with the marking of essays among teachers. To
verify if there is any truth to this, a group of students submitted the same essay to
different teachers. The grade awarded by each teacher for each essay was recorded. Use the data below to answer the questions that follow.
* The above data is also available in excel format on the course page.
Essay Quarrie Taylor Wilson Forbes
1 62 63 65 68
2 58 60 61 64
3 63 68 72 58
4 64 65 65 61
5 60 63 66 67
6 62 66 65 59
7 57 67 71 60
8 58 68 65 67
9 59 69 64 62
10 63 60 67 66
11 65 64 62 63
12 61 61 73 64
13 60 62 65 68
14 59 68 68 70
15 57 66 69 71
16 56 63 60 68
17 62 60 61 69
Is the mean score for each teacher
the best measure of
tendency
not there is inconsistency with the
marking of essays among
teachers?
All other things being constant, which of the four (4) teachers
would you say is the most
consistent regarding the grading
of the essays? Give one reason.
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