1. Suppose that a variance is thought to be σ² = 3. A random sample of n=25 yields asample standard deviation of s=2.1. α=0.05.(a) Test the hypothesis that the variance is not equal to 3 by using critical regions.(b) Test the hypothesis using the P-value.

Given: Sample size n=25 Population variance σ2=3 Sample standard deviation s=2.1 Significance level…

Answered: 1. Suppose that a variance is thought…

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 average age at which adolescent girls reach their adult height is 16 years. Suppose you have a sample of 29 adolescent girls who are developmentally delayed, and who have an average age at which they reached their adult height of 17.8 years and a sample variance of 77.4 years. You want to test the hypothesis that adolescent girls who are developmentally delayed have a different age at which they reached their adult height than all adolescent girls. In order to calculate the t statistic, you first need to calculate the estimated standard error. The estimated standard error SM = (round to four decimals)
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The average age at which adolescent girls reach their adult height is 16 years. Suppose you have a sample of 29 adolescent girls who are developmentally delayed, and who have an average age at which they reached their adult height of 17.8 years and a sample variance of 77.4 years. You want to test the hypothesis that adolescent girls who are developmentally delayed have a different age at which they reached their adult height than all adolescent girls. In order to calculate the t statistic, you first need to calculate the estimated standard error. The estimated standard error SM= (round to four decimals)
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Use Hypothesis Testing for variance.

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1. Suppose that a variance is thought to be o² = 3. A random sample of n=25 yields a sample standard deviation of s=2.1. α=0.05. (a) Test the hypothesis that the variance is not equal to 3 by using critical regions. (b) Test the hypothesis using the P-value.