Answered: The test statistic was found to be z =…

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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The test statistic was found to be z = −1.39 and will be used to find the p-value. Note that ≠ is used in the alternative hypothesis, indicating a two-tailed test. Recall the process for calculating the p-value for a two-tailed test. Calculate the test statistic. If the test statistic is positive, then find the upper tail area associated with this z-value. If the test statistic is negative, then find the lower tail area associated with this z-value. The p-value will be 2 times the upper or lower tail area. The calculated test statistic is positive negative , indicating the upper lower tail area should be found. Step 4 A lower tail area should be found since the test statistic, z = −1.39, is negative. The area under the curve to the left of a z-value corresponds to the lower tail area. Recall that the standard normal table gives the area to the left of z-values and the entire area under the curve is 1.Use the standard normal table to find the lower tail area for z = −1.39, rounding the result to four decimal places.area to the left of −1.39 =

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