Answered: 18,054 79.3 10,606 13,589 16,577 64.7…

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

Stocks and Sunspots. Listed below are annual high values of the Dow Jones Industrial Average (DJIA) and annual mean sunspot numbers for eight recent years. Use the data for Exercises 1–5. A sunspot number is a measure of sunspots or groups of sunspots on the surface of the sun. The DJIA is a commonly used index that is a weighted mean calculated from different stock values.

Data Analysis Use only the sunspot numbers for the following.

a. Find the mean, median, range, standard deviation, and variance.

b. Are the sunspot numbers categorical data or quantitative data?

c. What is the level of measurement of the data? (nominal, ordinal, interval, ratio)

18,054
79.3
10,606
13,589
16,577
64.7
11,625
12,929
14,198
13,338
DJIA
55.7
57.6
Sunspot Number
7.5
2.9
3.1
16.5

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