In the public schools in Massachusetts, the average number of students per computer for the 2007–2008 school year was 3.6 with a standard deviation of 1.3. A random sample of 40 public schools in the state of Massachusetts was obtained last year, and the average number of students per computer was found to be 4.3. (a) Determine the mean (in students per computer) of the sampling distribution of the sample mean. students per computer (b) Calculate the standard deviation (in students per computer) of the sampling distribution of the sample mean. (Round your answer to three decimal places.) students per computer (d) What is the probability of obtaining a sample average of 4.3 stud
In the public schools in Massachusetts, the average number of students per computer for the 2007–2008 school year was 3.6 with a standard deviation of 1.3. A random sample of 40 public schools in the state of Massachusetts was obtained last year, and the average number of students per computer was found to be 4.3. (a) Determine the mean (in students per computer) of the sampling distribution of the sample mean. students per computer (b) Calculate the standard deviation (in students per computer) of the sampling distribution of the sample mean. (Round your answer to three decimal places.) students per computer (d) What is the probability of obtaining a sample average of 4.3 stud
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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In the public schools in Massachusetts, the average number of students per computer for the 2007–2008 school year was 3.6 with a standard deviation of 1.3. A random sample of 40 public schools in the state of Massachusetts was obtained last year, and the average number of students per computer was found to be 4.3.
(a)
Determine the mean (in students per computer) of the sampling distribution of the sample mean.
students per computer
(b)
Calculate the standard deviation (in students per computer) of the sampling distribution of the sample mean. (Round your answer to three decimal places.)
students per computer
(d)
What is the probability of obtaining a sample average of 4.3 students per computer or more if the average number of students per computer has not changed since the 2007–2008 school year? (Use a table or technology. Round your answer to four decimal places.)
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