An Electrical Engineer Wants to Compare the Resistance of Four

question 37

Multiple Choice

An electrical engineer wants to compare the resistance of four types of wire made from different materials.Five wires of equal lengths and cross sectional areas are prepared for each of the four wire types.Each section of wire is randomly tested by sending a current through the wire and measuring the resistance.The box plots for the four wire types are shown below.

• A)Yes,the widths of the boxes are all the same.
• B)Yes,all the groups look like they are normally distributed.
• C)No,the spreads of the four groups look different.The response may need to be re-expressed before proceeding with the ANOVA.
• D)No,the centre lines are steadily increasing.
• E)Yes,the spreads look similar enough to proceed with the ANOVA.

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Definitions:

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The aspect of someone's character that is presented to or perceived by others, often tailored to the specific audience or context.

Public Face

The aspect of an individual's behavior or personality that is presented to or perceived by others; often contrasted with a more private or concealed aspect of the person.

Inner Self

The aspect of an individual that is considered the true, core identity or essence of the person, often distinguished from external appearances.

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A phase in Freudian psychosexual development occurring around ages three to six, where the child's libido centers upon their genitalia as the erogenous zone.