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:

Better Off

A term indicating an improvement in someone's situation or condition, often measured in terms of financial wellbeing, health, or quality of life.

Behavioral Economists

Behavioral economists study how psychological, cognitive, emotional, cultural, and social factors affect economic decisions of individuals and institutions, often challenging the assumption of rational decision-making.

Neoclassical Theories

A broad range of economic theories that emphasize the role of supply and demand in an economy, focusing on the allocation of resources and the distribution of income.

Behavioral Economics

A field of study that examines the psychological factors influencing economic decisions and behaviors, challenging the traditional assumption of rational decision-making.