A Traffic Engineer Plans to Estimate the Average Number of Cars

question 109

Multiple Choice

A traffic engineer plans to estimate the average number of cars that pass through an intersection each day. Based on previous studies the standard deviation is believed to be 52 cars. She wants to estimate the mean to within ±10 cars with 90 percent confidence. The needed sample size for n is:

• A) n = 104 days.
• B) n = 74 days.
• C) n = 10 days.
• D) n = 9 days.

Identify the significance of private speech in cognitive development according to Vygotsky.

Understand Jean Piaget's stages of cognitive development and how they apply from birth through adulthood.

Identify and critique key aspects of Vygotsky's theory, including the concept of scaffolding.

Explain Piaget's adaptation process, including assimilation, accommodation, and disequilibration, through examples.

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Definitions:

Purely Competitive

Refers to a market structure where many firms sell identical products, allowing no single firm to influence the market price.

Marginal Resource Cost

The extra cost associated with utilizing one additional unit of a resource in the production process.

Daily Wage

A pay rate based on the amount of work completed in a single day, typically used for manual or labor-intensive jobs.

Unionization Rates

The percentage of workers in a particular labor market or industry that are members of labor unions.