Which expression is equivalent to and why? x-20, because first you multiply the exponents in the numerator and then divide by the exponent in the denominator. x21, because you first you add the exponents in the numerator and then subtract by the exponent in the denominator, and then add the new exponents using the power of the power property. x, because you first you add the exponents in the numerator and then subtract by the exponent in the denominator, and then multiply the new exponents using the power of the power property. x2 because first you multiply each exponent by two using the power of a power property, then yoU add the new exponents in the numerator and subtract by the new exponent in the denominator.

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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.