MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Confidence Intervals
When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calcul…
Question

The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 140, while the mean score was 74 and the standard deviation was 15.

 
" The bell chart goes from 29,44,59, 74, 89,104,119 (end) 
 
Use the "Empirical Rule", not a calculator or other technology. Do not round your answers.
What is the approximate percentage students who scored between 59 and 89 on the test?
__?__%
What is the approximate percentage of students who scored higher than 104 on the test?
__?__%
What is the approximate percentage of students who scored between 74 and 89 on the test?
__?__%
What is the approximate percentage of students who scored between 44 and 104 on the test?
__?__%
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