THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 67

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
For calculating a 95% confidence interval for μ₁ - μ₂ the difference between the means of two normally distributed populations,the summary statistics from two independent samples are:
n_x = 60,
= 180,
= 360,n_y = 45,
= 160,and
= 900.
It is assumed that the Population variances are unknown and are equal.
-What is the lower confidence limit of the 95% confidence interval?

• A)29.505
• B)11.587
• C)10.495
• D)22.797

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Definitions:

Tertiary Reinforcement

A type of reinforcement that uses abstract rewards, such as praise or tokens, that can be exchanged for other rewards.

Shaping

A method used in behavioral training where successive approximations of a desired behavior are reinforced.

Successive Approximations

A method in behavior therapy and training in which complex behaviors are broken down into simpler steps, and these steps are learned gradually to achieve the target behavior.

Negative Reinforcement

A form of reinforcement in which the removal or avoidance of an unpleasant stimulus increases the probability of a behavior being repeated.