Answered: he life in hours of a biomedical device…

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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1. Explain the difference between the t-distribution and a normal distribution.
2. The life in hours of a biomedical device is known to be approximately normally distributed. A random sample of n = 14 devices is selected and found to have an average life of x¯ = 5620 hours and a sample SD of s = 220 hours. At α = 0.05, test the hypothesis that the true mean life is greater than 5500.
3. The life in hours of a biomedical device is known to be approximately normally distributed. A random sample of n = 14 devices is selected and found to have an average life of x¯ = 5620 hours and a sample SD of s = 220 hours. Construct a 99% Prediction Interval for the life of a new device

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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