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9. The following is the sampling distribution showing sample proportions from samples of size 40 from a population. 50 40 30 20 10 0.15 0.20 0.25 0.30 0.35 0.40 0.50 0.55 0.60 0.65 a. Estimate the value of the population parameter. Label it with the proper notation. b. Estimate the standard error. Show your work.

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