1. The average elementary teacher's salary in Recoletos Schools is ₱17,300. Assume a normal distribution with standard deviation of ₱2,530. What is the probability that the mean for a sample of 36 teachers' salaries is lesser than ₱16,500? 2. The average score of employees on a mental examination is 110. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 28. If a random sample of 90 scores were selected and the sample mean were calculated to be 102, what is the probability that the mean of the sample is greater than 102?
1. The average elementary teacher's salary in Recoletos Schools is ₱17,300. Assume a normal distribution with standard deviation of ₱2,530. What is the probability that the mean for a sample of 36 teachers' salaries is lesser than ₱16,500? 2. The average score of employees on a mental examination is 110. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 28. If a random sample of 90 scores were selected and the sample mean were calculated to be 102, what is the probability that the mean of the sample is greater than 102?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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1. The average elementary teacher's salary in Recoletos Schools is ₱17,300. Assume a normal
distribution with standard deviation of ₱2,530. What is the probability that the mean for a
sample of 36 teachers' salaries is lesser than ₱16,500?
2. The average score of employees on a mental examination is 110. Suppose that nothing is
known about the shape of the distribution and that the standard deviation is 28. If a random
sample of 90 scores were selected and the sample mean were calculated to be 102, what is the
probability that the mean of the sample is greater than 102?
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