Instruction 10-9 A Corporation Randomly Selects 150 Salespeople and Finds That 66

question 107

Multiple Choice

Instruction 10-9
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement course would like such a course.The firm did a similar study 10 years ago in which 60% of a random sample of 160 salespeople wanted a self-improvement course.The groups are assumed to be independent random samples.Let π₁ and π₂ represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study,respectively.
-Referring to Instruction 10-9,what is/are the critical value(s) when performing a Z test on whether population proportions are different if α = 0.05?

• A)± 1.96
• B)-1.96
• C)± 2.08
• D)± 1.645

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Definitions:

Short-Term Memory

Memory system that holds small amounts of information in an active, readily available state for a short period of time.

Stimulus-Independent Thoughts

Refers to thoughts and mental imagery not directly triggered by external stimuli, representing an internal stream of consciousness.

Central Executive

A part of working memory model that coordinates the activities of the two subsystems, the phonological loop and the visuo-spatial sketchpad, and integrates information from the episodic buffer.

Working Memory Capacity

The amount of information that can be held and manipulated in working memory, a key factor in cognitive processes such as reasoning, comprehension, and learning.