Answered: Consider the following statements…

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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Question

Consider the following statements concerning confidence intervals:

A. A confidence interval can only use information from the sample data to construct an interval estimate for a sample statistic not a population parameter.

B. An interval estimate is often preferred to a point estimate because an interval estimate provides more information.

C. To derive a confidence interval for a population mean when the population variance is unknown AND the sample size is small (<30), the population mean needs to satisfy that it is normally distributed.

only A is true

only B is true

only A and C are true

only B and C are true

A, B and C are true

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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