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 Measure of central tendency that is the value that occurs most frequently in a data set. A data set may have more than one mode if multiple categories repeat an equal number of times. For example, in a data set with five item—3, 5, 5, 29, 473—the mode is 5 because it occurs twice and no other value occurs more than once. On a histogram or bar chart, the element with the highest bar represents the mode. Therefore, the mode is sometimes considered the most popular option. The mode is useful for nominal or categorical data (e.g., the most common color car that users purchase), but it is problematic for continuous data because it is more likely not to have any value that is more frequent than the other.

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