I If the Null Hypothesis States That There Is No

question 47

Multiple Choice

i. If the null hypothesis states that there is no difference between the mean income of males and the
Mean income of females, then the test is one-tailed.
ii. If we are testing for the difference between two population means, it is assumed that the sample
Observations from one population are independent of the sample observations from the other
Population.
iii. The critical value of t for the claim that the difference of two means is less than zero with a level
Of significance of 0.025 and sample sizes of nine and seven, is -2.179.

• A) (i), (ii), and (iii) are all correct statements.
• B) (i) and (ii) are correct statements but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements but not (i).
• E) (ii) is a correct statement but not (i) and (iii).

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Definitions:

Demand Characteristics

Features of an experimental setting that lead participants to guess the purpose of the study, potentially influencing the behavior being studied.

Correlational Studies

Research methods that examine the relationship or correlation between two or more variables, without determining causal direction.

Strengths and Limitations

Represents the positive abilities and constraints or weaknesses possessed by an individual or system.

Case Studies

A research method involving an up-close, in-depth, and detailed examination of a subject of study (the case), as well as its related contextual conditions.