A Tutor Promises to Improve GMAT Scores of Students by More

question 21

Multiple Choice

A tutor promises to improve GMAT scores of students by more than 50 points after three lessons. To see if this is true, the tutor takes a sample of 49 students' test scores after and before they received tutoring. The mean difference was 53 points better after tutoring, with a standard deviation of the difference equal to 12 points. Let µ_D denote the mean of the difference: score after tutoring minus score before tutoring. Assuming α = 0.05, which of the following is the appropriate critical value?

• A) z = 1.677
• B) z = 2.011
• C) t_0.05,48 = 1.677
• D) t_0.05,₄₈ = 2.011

Explain the significance of the spacing effect and testing effect in enhancing long-term memory retention.

Understand the concepts and implications of memory consolidation and the role of various brain regions in long-term memory storage.

Acknowledge the capacity of human memory and the phenomena of infantile amnesia.

Appreciate the influence of personal relevance (self-reference effect) and encoding strategies (e.g., making information meaningful) on memory strength.

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Definitions:

Unfavorable

Refers to an outcome or condition that is disadvantageous or against the interests of a person or entity.

Favorable

A term used in accounting and finance to indicate that actual costs were lower than planned or budgeted costs.

Standard Cost System

An accounting system that uses standard costs for products or services for the purpose of controlling costs and assessing operational performance.

Standard Direct Labor-Hours

The estimated amount of labor hours required to produce a unit of product, used in budgeting and variance analysis.