Answered: The length of time required to complete…

The length of time required to complete the test normally distributed with mean 75 minutes and standard deviation 15 minutes. achievement Sufficient time for 95% of students to complete the

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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Q: help

Question

Please show all steps. Please DO NOT skip any steps as I will not understand what you actually did. QUESTION: How did you get Z = 1.65 from 95%z. Would that not be Z = 1.960? Please show every step. This has confused me.

The length of time required to complete the
achievement test normally distributed with mean
75 minutes and standard deviation 15 minutes.
Sufficient time for 95% of students to complete the
test.
P(z)= 0.95
Where, the z value corresponds to the 0.95 is 1.65
Now,
P(z)=0.95
z=1.65
-=1.65
x-75
15
Area = 0.95
u = 75
z = 1.65
x = 99.75
X= =(1.65 × 15)+75
=99.75
Thus, 99.75 minutes required by 95% of students
to complete the test.

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