Answered: A machine produces bolts with an…

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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3. A machine produces bolts with an average diameter of 0.51 inch and standard deviation of 0.01 inch. What percentage of the total production would posses bolt diameters from 0.48 to 0.54 inch? 4. A sample of medicine tablets were selected at random and yielded the following results: sample X weighted 5 grams and the simple standard deviation is 1 gram. Assuming that the weights are normally distributed and only the tablets weighing from 4 to 6 grams are acceptable, how many percent of the tablets will be rejected? 5. A sample of electrical bulbs manufactured by an electrical manufacturing company was selected at random. The average life of the sample bulbs is 600 burning hours and o = 10. (a) How many percent of the bulbs would you expect to last from 590 to 610 hours? (b) more than 620 burning hours? (c) less than 590 hours?v

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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