An Experiment Was Conducted to Determine the Effectiveness of a Method

question 118

Multiple Choice

An experiment was conducted to determine the effectiveness of a method designed to remove oil wastes found in soil. Three contaminated soil samples were treated. After 95 days, the percentage of contamination removed from each soil sample was measured, with a mean of 49.3 percent and a standard deviation of 1.5 percent. Estimate the mean percentage of contamination removed at a 98 percent confidence level.

• A) [48.36, 50.24]
• B) [43.27, 55.33]
• C) [47.29, 51.31]
• D) [47.88, 50.72]
• E) [46.47, 52.13]

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Definitions:

Behavioral Segmentation

The division of a market into groups based on consumer behaviors and purchasing decisions, allowing for more targeted marketing strategies.

Over 40 Weeks

A phrase indicating a time span longer than 40 weeks, often used in contexts such as project timelines, pregnancy, or financial performance tracking.

National Car Rental

A rental car agency based in the United States, providing vehicle rental services to customers worldwide.

80/20 Rule

A principle suggesting that 80% of effects come from 20% of causes, often used in business and economics to focus efforts on the most productive inputs.