Answered: Past experience has shown that 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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Past experience has shown that the length of time for students to enroll in college is normally distributed with
mean equal to 2 hours and 3 minutes. A new enrollment procedure is being tested. A random sample of 25 units
students has an average time of 1 hour and 40 minutes with a standard deviation of 50 minutes, can it be said
that the new enrollment procedure is effective in reducing the average time for enrollment? Use 1% level of
significance.

Ho:

Ha:

α =

Decision Rule:

Computation:

Decision:

Conclusion:

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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