Answered: A researcher is studying wood volume…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

A researcher is studying wood volume production in forested areas. Wood volume data were collected in different plots (sampling units) in areas A and B, as shown in the table below. The researcher states that there is no difference in the volume of wood produced between the two areas. It assumes that the volume of wood follows a normal distribution and that the population variance of the volume in area A (σ²A) is different from the population variance of the volume in area B (σ²B). Carry out an adequate hypothesis test to verify the researcher's statement, considering a significance level of 2%

Parcela	1	2	3	4	5	6	7	8	9	10
Área A	65	70	63	76	65	65	76	65	65	63
Área B	50	62	50	61	66	70	62	61	68

a. The test hypotheses in this study are: H0: μA=μB and Ha:μA>μB

b. The test statistic value calculated based on the data is:

c. The critical (absolute) value of the test for the desired significance level is:

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