Two Types of Flares Are Tested for Their Burning Times $n = 35 , \bar { Y } = 19.4 , s = 1.4$

question 12

Multiple Choice

Two types of flares are tested for their burning times (in minutes) and sample results are given below.
Brand A: $n = 35 , \bar { Y } = 19.4 , s = 1.4$
Brand B: $n = 40 , \bar { Y } = 15.1 , s = 0.8$
Construct a $95 \%$ confidence interval for the difference $\mu _ { A } - \mu _ { B }$ based on the sample data.

• A) \(( 3.8,4.8 )\)
• B) \(( 3.6,5.0 )\)
• C) \(( 3.2,5.4 )\)
• D) \(( 3.5,5.1 )\)
• E) \(( - 4.7 , - 3.9 )\)

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Definitions:

Marginal Cost Curve

A graphical representation showing how the cost to produce one additional unit of a good changes with different production levels.

Average Total Cost (ATC)

The average expense per unit of output, calculated by dividing the overall production cost by the amount of output generated.

Average Total Cost Curve

A graphical representation showing the average total cost of producing different quantities of a good or service.