If Two Random Samples of Sizes 30 and 36 Are $\bar { X } _ { 1 } - \bar { X } _ { 2 }$

question 64

Multiple Choice

If two random samples of sizes 30 and 36 are selected independently from two populations with means 78 and 85,and standard deviations 12 and 15,respectively,then the mean of the difference $\bar { X } _ { 1 } - \bar { X } _ { 2 }$ is equal to:

• A) -7
• B) 7
• C) (78 -85)/ (30 - 36)= 1.17
• D) 78/30 - 85/36 = 0.24

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Definitions:

Hygiene Factors

in workplace motivation theory, are elements that, if absent or inadequate, can cause job dissatisfaction, but their presence does not necessarily lead to high job satisfaction.

Job Satisfaction

The level of contentment employees feel about their work, which can affect their performance and overall well-being.

Hygiene Factors

Elements related to job conditions that can lead to dissatisfaction if absent, but do not necessarily motivate employees when present, as per Herzberg's Two-Factor Theory.

Job Dissatisfaction

The feeling of unhappiness or discontent with one's job, stemming from various factors such as working conditions, pay, or lack of fulfillment.