Two Samples Are Selected at Random from Two Independent Normally $\bar { X } _ { 1 } - \bar { X } _ { 2 }$

question 20

Multiple Choice

Two samples are selected at random from two independent normally distributed populations. Sample 1 has 49 observations and has a mean of 10 and a standard deviation of 5. Sample 2 has 36 observations and has a mean of 12 and a standard deviation of 3. The standard error of the sampling distribution of the sample mean difference, $\bar { X } _ { 1 } - \bar { X } _ { 2 }$ , is:

• A)0.1853.
• B)0.7602.
• C)0.7331.
• D)0.8719.

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Definitions:

Group Norms

Shared expectations and rules that guide behavior of people within social groups.

Ethical Behavior

Conduct that is consistent with what society and individuals typically consider to be good values, including honesty, fairness, and integrity.

Corporate Culture

The shared values, practices, and goals that shape the identity and operations of a company, influencing its employees' behavior.

Committees

Groups of individuals designated to perform a specific function or address issues within an organization, often bringing together expertise from different areas.