Question: The partial results below are based on a sample of recently trained workers, to determine if the number of hours of training time received (X,

The partial results below are based on a sample of recently trained workers, to determine if the number of hours of training time received (X, in hours) has helped in improving the time taken to troubleshoot a process problem (Y, in minutes).

What is the upper limit of the 98% confidence interval estimate for the average time taken to troubleshoot a process problem, of all workers with 415.8 minutes of training time?

Summary Statistics Variable N Mean Variance Uncorrected 55 Corrected 55 {55H} 3 23 6.33 6.352212 1535 131.3621 '1' 23 16.53621 25.33433 3633 211.3345 Parameter Estimates Variable Parameter Standard Estimate Error Intercept 23.53531 3.61232 Training {3) - 1 32545 3.33353 Standard Error 1.15234 R-Square 3.3431

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