Answered: Using the z table (The Standard Normal…

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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Using the z table (The Standard Normal Distribution Table), find the critical value (or values) for the right-tailed test with a=0.09

. Round to two decimal places, and enter the answers separated by a comma if needed.

Critical value(s)

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.

Expert Solution

Step 1

Given Information:

Significance level $α = 0.09$

Type of test: Right tailed

Required: To find z-critical value for a right tailed test at $α = 0.09$

For a right tailed test, the critical value corresponds to the point to the right of the centre of the distribution. In other words, the area under the normal curve for a right tail (from the critical point to the right) is equal to the given significance level.

Look up for 0.09 in the entries of the z-table:

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