Repeat Exercise X6.15, but do not assume equal variances. Are the two sets of results significantly different
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Repeat Exercise X6.15, but do not assume equal variances. Are the two sets of results significantly different (test at 5%)?
Data from Exercises 6.15
During an examination board concerns were raised concerning the marks obtained by students sitting the final year advanced economics (AE) and e-Marketing (EM) papers (Table 6.6).
Historically, the sample data varies as a normal distribution and the population standard deviations are approximately equal. Assess whether there is a significant difference between the two sets of results (test at 5%).
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