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What does this information tell you about the variability of the student's performance on the prelims? what can you conclude.

What does this information tell you about the variability of the student's performance on the prelims? what can you conclude.

MATLAB: An Introduction with Applications
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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What does this information tell you about the variability of the student's performance on the prelims? what can you conclude.

Problem Ms. Mercado is done recording the prelim exams of Accountancy Students. Scores represent items marked correct on the exam. The scores are provided below: Class Interval f fx <cf M X-M IX-MI (x-m)^ f(x-m)^2 20-24 22 22 45.38 -23.38 23.38 546.62 546.62 25-29 1. 27 27 2. 45.38 -18.38 18.38 337.82 337.82 30-34 3 32 96 45.38 -13.38 13.38 179.02 537.07 35-39 4 37 148 9 45.38 -8.38 8.38 70.22 280.90 40-44 8 42 336 17 45.38 -3.38 3.38 11.42 91.40 45-49 7 47 329 24 45.38 1.62 1.62 2.62 18.37 50-54 11 52 572 35 45.38 6.62 6.62 43.82 482.07 55-59 57 285 40 45.38 11.62 11.62 135.02 675.12 j= 5 40 1815 86.76 2969.38 Mean: 45.38 Measures of Variability Range: Sample Variance Sample Standard Deviation 40 74.23 8.62 Coefficient of variation 0.1899
Transcribed Image Text:Problem Ms. Mercado is done recording the prelim exams of Accountancy Students. Scores represent items marked correct on the exam. The scores are provided below: Class Interval f fx <cf M X-M IX-MI (x-m)^ f(x-m)^2 20-24 22 22 45.38 -23.38 23.38 546.62 546.62 25-29 1. 27 27 2. 45.38 -18.38 18.38 337.82 337.82 30-34 3 32 96 45.38 -13.38 13.38 179.02 537.07 35-39 4 37 148 9 45.38 -8.38 8.38 70.22 280.90 40-44 8 42 336 17 45.38 -3.38 3.38 11.42 91.40 45-49 7 47 329 24 45.38 1.62 1.62 2.62 18.37 50-54 11 52 572 35 45.38 6.62 6.62 43.82 482.07 55-59 57 285 40 45.38 11.62 11.62 135.02 675.12 j= 5 40 1815 86.76 2969.38 Mean: 45.38 Measures of Variability Range: Sample Variance Sample Standard Deviation 40 74.23 8.62 Coefficient of variation 0.1899
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