While Discussing the Reasons for Banning Diesel Engines, Technician a Says

question 38

Multiple Choice

While discussing the reasons for banning diesel engines, technician A says that diesel engines make up only 5% of the vehicles on the road but produce 24% of the transportation emissions, an amount of emissions that is disproportionately higher than what spark-ignition, gasoline-fueled vehicles produce. Technician B says that diesels will produce fewer emissions for every ton of weight hauled compared to spark-ignited, gasoline-fueled engines. Who is correct?

• A)Technician A
• B)Technician B
• C)Both A and B
• D)Neither A nor B

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Definitions:

Mean Square

The average of the squares of the differences between the observed and expected values, used in various statistical methods, such as ANOVA.

Main Effect

In analysis of variance, the direct influence of an independent variable on a dependent variable, discounting interactions with other variables.

Factor A

A variable manipulated or monitored to determine its effects on an outcome in an experiment.

Critical Value

A threshold value that separates the region where the null hypothesis is rejected from the region where it is not rejected, based on the chosen significance level.