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1. Find out the value of z such that 45% of the distribution lies between it and mean.

2. Suppose that the average annual salary for the worker in the United States is $31,000 and that annual salaries for Americans are normally distributed with the standard deviation equal to $7,500. Find out the following:

a) What percentage of the Americans earn below $20,000?

b) What percentage of the Americans earn above $45,000?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921167

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