2 An aptitude test for deep-sea divers has been designed to produce scores which are approximately normally distributed on a scale from 0 to 100 with standard deviation 25. The scores from a random sample of people taking the test were as follows. 23 35 89 35 12 45 60 78 34 66 (i) Find the mean score of the people in this sample. (ii) Construct a 90% confidence interval for the mean score of people taking the test. (iii) Construct a 99% confidence interval for the mean score of people taking the test. Compare this confidence interval with the 90% confidence interval.
2 An aptitude test for deep-sea divers has been designed to produce scores which are approximately normally distributed on a scale from 0 to 100 with standard deviation 25. The scores from a random sample of people taking the test were as follows. 23 35 89 35 12 45 60 78 34 66 (i) Find the mean score of the people in this sample. (ii) Construct a 90% confidence interval for the mean score of people taking the test. (iii) Construct a 99% confidence interval for the mean score of people taking the test. Compare this confidence interval with the 90% confidence interval.
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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Transcribed Image Text:2 (i) 47.7
(ii) 34.7 to 60.7
(iii) 27.3 to 68.1
Transcribed Image Text:2 An aptitude test for deep-sea divers has been designed to produce scores which
are approximately normally distributed on a scale from 0 to 100 with standard
deviation 25. The scores from a random sample of people taking the test were
as follows.
23
35
89 35
12
45 60 78 34
66
(i) Find the mean score of the people in this sample.
(ii) Construct a 90% confidence interval for the mean score of people taking
the test.
(iii) Construct a 99% confidence interval for the mean score of people taking the
test. Compare this confidence interval with the 90% confidence interval.
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