Answered: To find the impact of students working…

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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To find the impact of students working while enrolled in classes, a researcher carried out a survey to estimate students' mean working hours per day. This survey of 25 students provides a sample mean of 7.10 hours with a sample standard deviation of 5 hours. Assume all such students working hours follow a normal distribution.

Suppose university claims in one of their newsletters that students work more than 6 hours per day on average. Suppose the researcher decided to test the university claim at a 5% significance level.

What is the calculated test statistics?

(round your answer to one decimal places)

The critical value is:

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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