The mean life of a certain metal saw blade is 31 hours, with a standard deviation of 4.30 hours. Assuming that the distribution is normal, What is the probability that a simple random sample of 30 metal saw blades has a mean of less than 32 hours? 1.) SD of the sample mean (input 4 decimal places)=   2.) z-score (input 2 decimal places) =   3.) Final answer/ Probability (input 2 decimal places) =

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

The mean life of a certain metal saw blade is 31 hours, with a standard deviation of 4.30 hours. Assuming that the distribution is normal,

What is the probability that a simple random sample of 30 metal saw blades has a mean of less than 32 hours?

1.) SD of the sample mean (input 4 decimal places)=

 

2.) z-score (input 2 decimal places) =

 

3.) Final answer/ Probability (input 2 decimal places) = 

Expert Solution
steps

Step by step

Solved in 4 steps

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman