Question
1. want determine if there is a significant correlation between cumulative GPA and having access to free meals at 7 Ontario universities. We tabulate the
1. want determine if there is a significant correlation between cumulative GPA and having access to free meals at 7 Ontario universities. We tabulate the data as follows (see the table on the next page).
University | % of students having free meals (X) | % of students having a CPGA over 3.2 (Y) |
Windsor | 14.4 | 54.0 |
Western | 7.2 | 64.0 |
Toronto | 27.5 | 44.0 |
Guelph | 54.0 | 32.0 |
McMaster | 38.0 | 37.0 |
York | 15.9 | 68.0 |
Brock | 3.1 | 62.0 |
a) Determine both the Pearson and Spearman correlation coefficients by hand.
b) Are the Pearson and Spearman correlations statistically significant for alpha = 0.05? Use a t-test for the Pearson coefficient and the Spearman table for the Spearman coefficient.
c) If the tests agree explain why and if they disagree, explain why.
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