Question: The article Drift in Posturography Systems EquippedWith a Piezoelectric Force Platform: Analysis and Numerical Compensation (L. Quagliarella, N. Sasanelli, and V. Monaco, IEEE Transactions on

The article "Drift in Posturography Systems EquippedWith a Piezoelectric Force Platform: Analysis and Numerical Compensation" (L. Quagliarella, N. Sasanelli, and V. Monaco, IEEE Transactions on Instrumentation and Measurement, 2008: 997-1004), reported the results of an experiment to determine the effect of load on the drift in signals derived from a piezoelectric force plates. The correlation coefficient y between output and time under a load of 588 N was −0.9515. Measurements were taken 100 times per second for 300 seconds, for a total of 30,000 measurements. Find a 95% confidence interval for the population correlation ρ.

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