Why dont you use the same value in both

Reference no: EM13241195

When you calculate CIs for time on task, I notice that you use the critical value from the t-distribution (TINV(0.05, degrees_of_freedom)). But when you calculate CIs for task completion rate (using the Adjusted Wald Method), you use the critical value from the z-distribution (1.96). Why don't you use the same value in both?

Reference no: EM13241195

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