A Psychologist Has Designed a New Intelligence Test

question 43

Multiple Choice

A psychologist has designed a new intelligence test. Historically, time to complete the old test was an average of 120 minutes. With the altered format of the test, the psychologist claims that the time to complete the test is no longer 120 minutes. A sample of 50 new test taking times yielded an average time of 118 minutes. The population standard deviation is known to be 5 minutes
-The null and alternative hypothesis to test if the average time to complete the test had changed from 120 minutes is _____.

• A)H₀: µ = 120 H_a: µ ≠ 120
• B)H₀: µ ≥ 120 H_a: µ < 120
• C)H₀: µ ≤ 120 H_a: µ > 120
• D)H₀: µ ≠ 120 H_a: µ = 120
• E)H₀: µ ≥ 118 H_a: µ < 118

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Definitions:

Grades

Evaluations or assessments of a student's performance or understanding in an educational setting, typically represented by letters or numbers.

Primary Drives

Basic, instinctive impulses that motivate behavior, such as hunger, thirst, and the drive for sexual reproduction.

Unlearned

Referring to behaviors or knowledge that are innate or natural, not acquired through learning or experience.

External Incentives

External factors or rewards that motivate behavior, such as money, grades, or social recognition.