3. Method I Method II Method III Method IV 14 16 16 17 10 18 15 20 11 14 14 19 13 15 12 21 Use Kruskal -Wallis test at 5% level that there is a significant difference between the four methods of teaching.

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.