When testing for a difference between the means of a treatment group and a placebo group, the computer display below is obtained. Using a 0.05 significance level, is there sufficient evidence to support the claim that the treatment group (variable 1) comes from a population with a mean that is less than the mean for the placebo population? Explain.
Definitions:
Language Development
The method through which young children grasp and express language in the initial stages of their childhood.
Two-word Stage
A phase in early language development during which children begin to use two-word sentences to communicate their desires, thoughts, and feelings.
Problem-solving Strategy
An approach or method specifically designed and used to find solutions to difficult or complex issues.
Nondeclarative Memory
Refers to the type of long-term memory that implies the recall of skills and habits, sometimes known as implicit memory, which operates without conscious awareness.
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