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In a large city it was found that summer electricity bills for single-family home followed a normal distribution with standard deviation $100. A random sample of 25 bills was taken.

a. Find the probability that the sample standard deviation is less than $75.

b. Find the probability that the sample standard deviation more than $150.

Econometrics, Economics

  • Category:- Econometrics
  • Reference No.:- M9472225

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