1. At a conference organized by the department of Statistics and Actuarial Science at the University of Ghana, some facilitators made a lot of claims about statistical inference. Three of which are: i. Under no circumstance should one use non- parametric methods. ii. The sign test is more powerful than the Wilcoxon sign rank test. iii. The Friedman test and Kruskal Wallis test can be used interchangeably. State whether you AGREE or DO NOT AGREE to each of the statements made above. Give reasons for your choice in each case.

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