Answered: 1.Which of the following statements…

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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1.Which of the following statements about a standard normal variable is true?

a) It has a standard deviation of zero

b) The total area under the standard normal curve is sometimes approximately equal to one

c) It has a mean of zero and standard deviation of one

d) Most of the time, the area under the half of the standard normal curve is approximately equal to one-half

2. Which of the following does not apply to the normal distribution?

a) The normal curve is unimodal (that is, it has one mode)

b) The total area under the curve is equal to one

c) The normal curve is symmetric about its standard deviation

d) The mean and the median are equal

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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