A Psychology Student Wishes to Investigate Differences in Political Opinions

question 154

Multiple Choice

A psychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. She randomly selects 100 students from the 260 business majors and 100
Students from the 180 political science majors. Does this sampling plan result in a random sample? Simple
Random sample? Explain.

• A) No; yes. The sample is not random because political science majors have a greater chance of being selected than business majors. It is a simple random sample because all samples of size 200 have the same chance
• Of being selected.
• B) Yes; no. The sample is random because all students have the same chance of being selected. It is not a simple random sample because some samples are not possible, such as a sample consisting of 50 business
• Majors and 150 political science majors.
• C) Yes; yes. The sample is random because all students have the same chance of being selected. It is a simple random sample because all samples of size 200 have the same chance of being selected.
• D) No; no. The sample is not random because political science majors have a greater chance of being selected than business majors. It is not a simple random sample because some samples are not possible, such as a
• Sample consisting of 50 business majors and 150 political science majors.

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Definitions:

Monopolistically Competitive

A market structure characterized by many sellers offering differentiated products, leading to some degree of market power but still allowing for competition.

Efficient Use

The optimal utilization of resources to achieve the highest possible output or satisfaction with the least possible waste.

Minimum ATC

The point on a firm’s average total cost curve where the cost is at its lowest, representing the most efficient scale of production.

Optimal Scale

The size of a company or factory at which the costs of production are minimized and productivity is maximized.