An engineer designs an improved light bulb.  The previous design had an average lifetime of 1200 hours.  The new bulb had a lifetime of 1200.2 hours, using a sample of 40,000 bulbs.  Although the difference is quite small, the effect was statistically significant.  The most likely explanation is     A) that new designs typically have more variability than standard designs.   B) that the sample size is very large.   C) that the mean of 1200 is large.   D) All of the above are very likely explanations.

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

An engineer designs an improved light bulb.  The previous design had an average lifetime of 1200 hours.  The new bulb had a lifetime of 1200.2 hours, using a sample of 40,000 bulbs.  Although the difference is quite small, the effect was statistically significant.  The most likely explanation is

 

 

A)

that new designs typically have more variability than standard designs.

 

B)

that the sample size is very large.

 

C)

that the mean of 1200 is large.

 

D)

All of the above are very likely explanations.

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 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