Two Independent Samples of Sizes 40 and 50 Are Randomly $\mu _ { 1 } - \mu _ { 2 }$

question 41

Multiple Choice

Two independent samples of sizes 40 and 50 are randomly selected from two populations to test the difference between the population means $\mu _ { 1 } - \mu _ { 2 }$ . Assume the population variances are known. The sampling distribution of the sample mean difference $\bar { x } _ { 1 } - \bar { x } _ { 2 }$ is:

• A)normally distributed.
• B)approximately normal.
• C)Student t-distributed with 88 degrees of freedom.
• D)None of these choices.

Identify various supply chain strategies and their application in real-life scenarios.

Comprehend the concept and significance of sustainable sourcing and its impact.

Learn about intermodal transportation and its advantages.

Grasp the concepts of push and pull strategies within the supply chain.

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Definitions:

Fixed Interval

A schedule of reinforcement where the first response is rewarded only after a specified amount of time has elapsed, leading to a pattern of response immediately after the interval passes.

Variable Interval

describes a schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed, enhancing response consistency.

Fixed-ratio

A reinforcement schedule in which a behavior is rewarded after a certain number of responses have been made.

Variable-ratio

A type of reinforcement schedule in operant conditioning where a response is reinforced after an unpredictable number of responses, making it very effective in maintaining high rates of responding.