Answered: Consider a positive number \(a\). Which…

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 a positive number \(a\). Which respect to the standard normal distribution, which of the following is true?

a. \(P(z>a)\) increases as \(a\) increases.

b. None of these

c. \(P(z>a)\) decreases as \(a\) decreases.

d. \(P(z<a)\) increases as \(a\) increases.

Which of the following is true about the standard deviation of a sampling distribution of means derived from a population as the sample size gets larger?

a. It becomes larger as well.

b. It depends on the value of the population mean

c. None of these

d. It becomes smaller.

Which of the following is the value of \(P(1.12<z<1.30)\)?

a. 0.0346

b. 0.0363

c. 0.7735

d. 0.7718

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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