What is the probability that the mean for a sample of 36 teachers' salaries is lesser than ₱20,000?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The average elementary teacher's salary in Recolet Schools is ₱21,200. Assume a normal distribution with standard deviation of ₱2,500. What is the probability that the mean for a sample of 36 teachers' salaries is lesser than ₱20,000? Show the complete solution.
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