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Suppose you know that the distribution of sample proportions of the residents of one town over 70 years old in samples of 110 residents is normal with a mean of 0.12 and a standard deviation of 0.03. You select a sample of 110 residents and find that the proportion of residents over 70 is 0.09. The standard score corresponding to this sample proportion is -1. What is the probability that a second sample would be selected with a proportion less than 0.09?

A. 0.8413

B.0.5187

C.0.1357

D. 0.8643

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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