The accompanying frequency distribution on depositedenergy (mJ) was extracted from the article “ExperimentalAnalysis of Laser-Induced Spark Ignition of LeanTurbulent Premixed Flames” (Combustion and Flame,2013: 1414–1427).1.0− , 2.0 5 2.0− , 2.4 112.4− , 2.6 13 2.6− , 2.8 302.8− , 3.0 46 3.0− , 3.2 663.2− , 3.4 133 3.4− , 3.6 1413.6− , 3.8 126 3.8− , 4.0 924.0− , 4.2 73 4.2− , 4.4 384.4− , 4.6 19 4.6− , 5.0 11a. What proportion of these ignition trials resulted in adeposited energy of less than 3 mJ?b. What proportion of these ignition trials resulted in adeposited energy of at least 4 mJ?c. Roughly what proportion of the trials resulted in adeposited energy of at least 3.5 mJ?d. Construct a histogram and comment on its shape.
The accompanying frequency distribution on deposited
energy (mJ) was extracted from the article “Experimental
Analysis of Laser-Induced Spark Ignition of Lean
Turbulent Premixed Flames” (Combustion and Flame,
2013: 1414–1427).
1.0− , 2.0 5 2.0− , 2.4 11
2.4− , 2.6 13 2.6− , 2.8 30
2.8− , 3.0 46 3.0− , 3.2 66
3.2− , 3.4 133 3.4− , 3.6 141
3.6− , 3.8 126 3.8− , 4.0 92
4.0− , 4.2 73 4.2− , 4.4 38
4.4− , 4.6 19 4.6− , 5.0 11
a. What proportion of these ignition trials resulted in a
deposited energy of less than 3 mJ?
b. What proportion of these ignition trials resulted in a
deposited energy of at least 4 mJ?
c. Roughly what proportion of the trials resulted in a
deposited energy of at least 3.5 mJ?
d. Construct a histogram and comment on its shape.
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