Answered: SCORES IN MATM 111 FINAL DEPARTMENTAL…

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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SCORES IN MATM 111 FINAL DEPARTMENTAL EXAMINATION, FOLLOW A NORMAL DISTRIBUTION WITH A MEAN OF 65 IN STANDARD DEVIATION OF 8. IF A STUDENT IS TO BE SELECTED,

CHOOSE THE CORRECT ANSWER ON THE FF:

WHAT IS THE CORRESPONDING Z-SCORE OF 85?
-2.5
+2.22
-2.22
+2.5

WHAT IS THE PROBABILITY THAT THE STUDENT SCORE IS GREATER THAN 85?

49.38%
99.38%
6.2%
0.62%

WHAT IS THE CORRESPONDING Z SCORE OF 56?

+1.12
-1.13
+1.13
-1.12

WHAT IS THE PROBABILITY THAT THE STUDENT’S SCORE IS LESS THAN 56?

12.92%
87.08%
13.14%
37.08%

IF THERE ARE 2000 STUDENTS WHO TOOK THE EXAM, HOW MANY OF THEM SCORED GREATER THAN 85?

14
16
13
15

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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