An Experimental Psychologist Is Interested in Whether the Color of an Animal's

question 60

Multiple Choice

An experimental psychologist is interested in whether the color of an animal's surroundings affects learning rate. He tests 16 rats in a box with colorful wallpaper. The average rat (of this strain) can learn to run this type of maze in a box without any special coloring in an average of 25 trials, with a variance of 64, and a normal distribution. The mean number of trials to learn the maze, for the rats tested with the colorful wallpaper, is 11.
-What is the null hypothesis?

• A)The rate of learning for the sample of rats tested with colorful wallpaper will be no different than the population of rats tested under ordinary circumstances.
• B)The rate of learning for the sample of rats tested with colorful wallpaper will be faster than the population of rats tested under ordinary circumstances.
• C)The rate of learning for the population of rats tested with colorful wallpaper will be no different than the population of rats tested under ordinary circumstances.
• D)The rate of learning for the population of rats tested with colorful wallpaper will be faster than the population of rats tested under ordinary circumstances.

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Definitions:

Controllable Fixed Costs

Fixed costs that management has the ability to influence or change over the short term, such as advertising expenses.

Return on Investment

The ratio of net profit to cost of investment, indicating the efficiency of an investment in generating profit.

Responsibility Level

The scope of authority and accountability designated to individuals or departments within an organization, often related to budgeting and costs.

Controllable Costs

Costs that can be influenced or changed by management decisions in the short term.