Exhibit 10

question 10

Multiple Choice

Exhibit 10.9.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 denote the mean of the difference: score after tutoring minus score before tutoring. Refer to Exhibit 10.9.Which of the following hypotheses will determine if the students improved their test scores by more than 50 points after being tutored?

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Definitions:

Sexual Motivation

The driving force behind thoughts, feelings, and behaviors related to sexuality.

Ethologists

Scientists who study animal behavior in natural environments.

Language

A system of symbols, signs, sounds, and rules used by humans to communicate thoughts, emotions, and information to others.

Lorenz

Refers to Konrad Lorenz, an Austrian zoologist, ethologist, and ornithologist known for his foundational work in ethology, the study of animal behavior.