Answered: In all distributions, the 5th decile is…

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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TRUE OR FALSE 20. In all distributions, the 5th decile is always equal to the median. 21. One tests a hypothesis about a statistic but not about a parameter. 22. In testing for independence, the null hypothesis is that the variables are related. 23. The mode can be used for both qualitative and quantitative data. 24. In cluster sampling, each cluster is formed in such a way that the elements are heterogeneous with respect to the characteristic under study, while in stratified sampling, the elements in each stratum are homogeneous with respect to the characteristic under study. 25. If the test accepts Ho at 0.10 level of significance, then the test will likewise accept Ho at 0.05 level of significance. 26. The sampling distribution of the population mean when the sample size is sufficiently large will approximate the shape of the standard normal curve whether or not the parent population is normally distributed. 27. The second quartile divides an array into two equal parts. 28. The probability distribution of a parameter is called a sampling distribution. 29. In simple linear regression, y-hat = 2.6 - 4x means that for every unit increase in X, we will expect the mean of Y to increase by 2.6 units. 30. Multiplying a constant to each value in the data will affect the measures of location and dispersion.

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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