Find the mean-variance
Given following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work.
Class / Frequency51-53 / 954-56 / 1957-59 / 1660-62 / 2463-65 / 25
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A charge of -2.0 nC and a charge of +2.0 nC are positioned on the x-axis at x = -1.0 cm and x = +1.0 cm, correspondingly. i) At what position or positions on the x-axis is the electric field zero?
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If the savings fund pays interest at the rate of 3% per year compounded semiannually, how much money invested now will amount to $5000 after one year? Illustrate all work.
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