Question

What stem and leaf MATLAB code do you use to solve this problem?

An article in Technometrics (Vol. 19, 1977, p. 425) presents the following data on the motor fuel octane ratings of several blends of gasoline: 88.5 98.8 89.6 92.2 92.7 91.8 91.0 91.0 94.7 88.3 90.4 83.4 87.9 88.4 87.5 90.9 84.3 90.4 91.6 91.0 93.0 92.6 87.8 89.9 90. 1 91.2 90.7 88.2 94.4 93.7 88.3 91.8 89.0 90.6 88.6 88.5 90.4 96.5 89.2 89.7 89.8 92.2 88.3 93.3 91.2 84.3 92.3 92.2 91.6 87.7 94.2 87.4 91.2 93.2 88.9 90.3 91.1 85.3 91.1 86.7 88.6 89.8 90.0 91.5 86.7 93.4 90.1 89.3 90.5 100.3 94.2 90.8 88.7 92.7 92.7 93.3 89.9 96.1 91.1 87.6 90.1 89.3 86.7

Answer 1

The MATLAB output is:

The code is:

- . A MATLAB R2019a HOME x Sign In O Search Documentation D = L New a Save e 21 Pun Section Run and Open PLOTS APPS EDITOR PUBLISH VIEW A do C E Find Files Insert E. fx Fri Compare - Go To Comment % 92% Breakpoints Run Run and , Advance Run and Print Find - Indent & Advance Time NAVIGATE EDIT BREAKPOINTS Program Files Polyspace R2019a bin 7 Editor - Untitled* x Untitled* x + ratings = [88.5, 98.8, 89.6, 92.2, 92.7, 91.8, 91, 91, 94.7, 88.3, 90.4, 83.4, 87.9, 88.4, 87.5, 90.9, 8 stem (ratings) FILE a l Current Folder Name m3iregistry registry RUN Workspace Name - 90.9, Value 1x83 double ratings util - O X Desktop Window Figure 1 File Edit 083 Help DU win32 win64 crash_analyzer.cfg Icdata.xml Icdata.xsd Icdata_utf8.xml matlab.exe mex.bat mexext.bat o mw_mpiexec.bat worker.bat View 3 Insert Tools 0 E 100 to bombenemente por el enlace praktikohalole Command Window Details Columns 71 through 93.4000 89.3000 87.6000 Columns 81 through O 10 20 30 40 50 60 70 80 90 Select a file to view details 90.1000 89.3000 >> stem (ratings) >> fx

ratings = [88.5, 98.8, 89.6, 92.2, 92.7, 91.8, 91, 91, 94.7, 88.3, 90.4, 83.4, 87.9, 88.4, 87.5, 90.9, 84.3, 90.4, 91.6, 91, 93, 92.6, 87.8, 89.9, 90.1, 91.2, 90.7, 88.2, 94.4, 93.7, 88.3, 91.8, 89, 90.6, 88.6, 88.5, 90.4, 96.5, 89.2, 89.7, 89.8, 92.2, 88.3, 93.3, 91.2, 84.3, 92.3, 92.2, 91.6, 87.7, 94.2, 87.4, 91.2, 93.2, 88.9, 90.3, 91.1, 85.3, 91.1, 86.7, 88.6, 89.8, 90, 86.7, 90.1, 90.5, 94.2, 88.7, 92.7, 91.5, 93.4, 89.3, 100.3, 90.8, 92.7, 93.3, 89.9, 96.1, 91.1, 87.6, 90.1, 89.3, 86.7]
stem(ratings)

The stem plot is:

120 X 38 Y 96.5 100 F စု ခု ထ 80 HD န ထထထအန နဆန ထ၀န ထ၀၀၀ ကျ o 10 20 30 40 50 60 70 80 90

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