ou and your team have built a chess computer. Tlo investigate how well it performs, ou organise a tournament with 100 randomly selected grandmasters (a title given to xpert chess players by the world chess organization FIDE), where your computer will lay each of the grandmasters once, and it is recorded whether the game is a win for the omputer, a win for the grandmaster, or a draw. For each win against a grandmaster, he computer scores 1 point, and for each draw the computer scores half a point. At the nd of the tournament, the chess computer has scored 60 points.

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

Please answer the second part (iv) (v) (vi) (vii)

You and your team have built a chess computer. To investigate how well it performs,
you organise a tournament with 100 randomly selected grandmasters (a title given to
expert chess players by the world chess organization FIDE), where your computer will
play each of the grandmasters once, and it is recorded whether the game is a win for the
computer, a win for the grandmaster, or a draw. For each win against a grandmaster,
the computer scores 1 point, and for each draw the computer scores half a point. At the
end of the tournament, the chess computer has scored 60 points.
i) Identify the population, sample and sample size.
ii) Identify a reasonable parameter and parameter space.
iii) Using the results of the tournament, give an estimate of the parameter. Explain
whether this is an unbiased estimate.
Subsequently, you and your team go away to improve the chess computer. After a
while, you organise another tournament, where the computer will again play 100
randomly selected grandmasters. Two members of your team make claims about the
new version of the computer. Alice claims that the new version will perform better
against grandmasters than the previous version. Bob claims that the new version will
score an average of at least 0.7 points in games against a grandmaster.
iv) Give the null and alternative hypotheses for both Alice and Bob's claims.
v) Using the concept of the critical value, explain how Alice's claim can be tested.
vi) Using the concept of the p-value, explain how Bob's claim can be tested.
Based on the results of the second tournament, you decide there is sufficient evidence
for both Alice and Bob's claims to be accepted. However, you later discover that both
your tournaments occurred at the same time as the Candidates Tournament (one of
the most important chess tournaments), and so, each time, your random selection of
grandmasters excluded the best 10%.
vii) With reference to Type I and/or Type II errors, explain how this discovery might
change your attitude to each of Alice and Bob's claims.
Transcribed Image Text:You and your team have built a chess computer. To investigate how well it performs, you organise a tournament with 100 randomly selected grandmasters (a title given to expert chess players by the world chess organization FIDE), where your computer will play each of the grandmasters once, and it is recorded whether the game is a win for the computer, a win for the grandmaster, or a draw. For each win against a grandmaster, the computer scores 1 point, and for each draw the computer scores half a point. At the end of the tournament, the chess computer has scored 60 points. i) Identify the population, sample and sample size. ii) Identify a reasonable parameter and parameter space. iii) Using the results of the tournament, give an estimate of the parameter. Explain whether this is an unbiased estimate. Subsequently, you and your team go away to improve the chess computer. After a while, you organise another tournament, where the computer will again play 100 randomly selected grandmasters. Two members of your team make claims about the new version of the computer. Alice claims that the new version will perform better against grandmasters than the previous version. Bob claims that the new version will score an average of at least 0.7 points in games against a grandmaster. iv) Give the null and alternative hypotheses for both Alice and Bob's claims. v) Using the concept of the critical value, explain how Alice's claim can be tested. vi) Using the concept of the p-value, explain how Bob's claim can be tested. Based on the results of the second tournament, you decide there is sufficient evidence for both Alice and Bob's claims to be accepted. However, you later discover that both your tournaments occurred at the same time as the Candidates Tournament (one of the most important chess tournaments), and so, each time, your random selection of grandmasters excluded the best 10%. vii) With reference to Type I and/or Type II errors, explain how this discovery might change your attitude to each of Alice and Bob's claims.
Expert Solution
steps

Step by step

Solved in 4 steps with 1 images

Blurred answer
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