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Name: A random sample of 40 students was selected from students who took the
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Description: A random sample of 40 students was selected from students who took the statistics course this semester. The average time for a sample of students in the library is 8.8 hours of time. Assuming normal population distribution time is normally with a sta

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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A random sample of 40 students was selected from students who took the statistics course this semester. The average time for a sample of students in the library is 8.8 hours of time. Assuming normal population distribution time is normally with a standard deviation of 5.2 hours,

(i) obtain 90% interval results for the time the university student population is in the library in time.

(ii) determine the sample size required to estimate the time the university student population is in the library if the sampling error is almost 1.5 hours of time with an information level of 99%.

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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