In a random sample of 15 cereal boxes, the mean weight was 11.89 ounces and the standard deviation was .05 ounce. Assume the weights of the cereal boxes are normally distributed and the population standard deviation is 0.05 ounce. Construct a 95 percent confidence interval for the population mean. Interpret the results.

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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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In a random sample of 15 cereal boxes, the mean weight was 11.89 ounces and the standard deviation was .05 ounce. Assume the weights of the cereal boxes are normally distributed and the population standard deviation is 0.05 ounce. Construct a 95 percent confidence interval for the population mean. Interpret the results.

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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