Answered: Find the 99% confidence interval of 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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Show the complete solutions 1. A new medication aims to increase the pulse rate of its users. The standard deviation of pulse rates is known to be 5 beats per minute. A sample of 30 users had an average pulse rate of 104 beats per minute. Find the 99% confidence interval of the true mean. 2. Fifty randomly selected jeepneys were stopped, and the tread depth of their right front tires were measured. The mean was 0.32 inch and the standard deviation was 0.08 inch. Find the 99% confidence interval of the mean depth. Assume that the variable is approximately normally distributed.

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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