Are the means for the final exams the same for all statistics class delivery typ
ID: 3431483 • Letter: A
Question
Are the means for the final exams the same for all statistics class delivery types? The table below shows the scores on final exams from several randomly selected classes that used the different delivery types. Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of 0.05.
Online
Hybrid
Face-to-face
72
83
80
84
73
78
77
84
84
80
81
81
81
86
79
82
Online
Hybrid
Face-to-face
72
83
80
84
73
78
77
84
84
80
81
81
81
86
79
82
Explanation / Answer
Ho: all mean are equal (i.e. null hypothesis)
Ha: at least one mean is different (i.e. alternative hypothesis)
The test statistic is
F=0.64
The p-value of F test is 0.5437
Since the p-value is larger than 0.05, we do not reject Ho.
So we can conclude that the means for the final exams are the same for all statistics class delivery types
Mean n Std. Dev 78.8 5 4.55 Online 80.3 4 4.99 Hybrid 81.4 7 2.82 Face-to-face 80.3 16 3.88 TotalRelated Questions
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