Answered: Students may choose between a…

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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Students may choose between a 3-semester-hour course in Physics without lab and a 4-semester-hour course with lab. The final written examination is the same for each section. If 12 students in the section with lab made an average examination grade of 84 with a standard deviation of 4 and 18 students in the section without lab made an average grade of 77 with standard deviation of 6, find a 99 % confidence interval for the difference between the average grades for the two courses. Assume the populations to be approximately normally distributed with equal variances. ( t-value)

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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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