You Are Evaluating Investing in a Cognitive Training Company

question 42

Multiple Choice

You are evaluating investing in a cognitive training company.For this reason, you want to determine whether users who complete at least 75% of the recommended daily training for two months show improved levels of reading comprehension and problem-solving skills.You select a random sample of new users and get test scores for each participant in the sample.The test score is a composite of reading comprehension and problem-solving skills.Two months later, you randomly select 15 users from the original sample who have completed 75% or more of the recommended training in the last two months and have them take a test similar to the initial test.You are interested in determining whether the average test score before training is different than the average test score after training for this sample.The after-training average is 92.8, which is 2.7 points higher than the before-training average.The sample standard deviation of the differences is 1.2.You can assume that the differences are normally distributed in the population.The degrees of freedom for this test are ______.

• A)30
• B)29
• C)28
• D)15
• E)14

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Definitions:

Get Along

The ability or capacity of individuals to maintain harmonious and functional relationships with others.

Rational Emotive Therapy

A psychotherapy procedure introduced by Ellis that examines the irrational reasoning causing emotional problems.

A-B-C Process

A model in cognitive behavioral therapy outlining the sequence of Antecedent, Behavior, and Consequence.

Goals

Targets or outcomes that an individual or organization aims to achieve, which guide behavior and decision-making.