10. Consider the system of differential equations dr 2y dt dy = -2r dt which has eigenvalues X= ±2i Sketch the phase portrait and classify the system by stating whether the origin is a stable or unstable node, stable or unstable spiral, stable center, or saddle point. / 11.Consider the system of differential equations

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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.