Answered: Summarize the data using the…

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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Question

a. Summarize the data using the Descriptive Statistics tool. What can you say about the shape of the distribution of times?

Mean	143.33143.33
Standard Error	23.5023.50
Median	121.5121.5
Mode	7272
Standard Deviation	128.71128.71
Sample Variance	16,567.4716,567.47
Kurtosis	7.287.28
Skewness	2.352.35
Range	629629
Minimum	1616
Maximum	645645
Sum	43004300
Count	30

What can you say about the shape of the distribution of times? The (blank) values suggest that the distribution is (blank).

Choose one of the options from each of the two images to fill in the blank.

mean and standard deviation
range and count
minimum and maximum
kurtosis and skewness

multimodal, and positively skewed.
peaked, and relatively symmetric.
uniformly distributed.
peaked, and negatively skewed.
multimodal, and negatively skewed.
multimodal, and relatively symmetric.
peaked, and positively skewed.

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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