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IOP2601 ASSIGNMENT 3 SEMESTER 2 2023

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  • Organisational Research Methodology
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  • University Of South Africa (Unisa)

Question 1: 1.1 In her study, the research psychologists stated “There is no difference in memory scores of patients diagnosed with depression and those who are not.” This is a typical example of a/an null hypothesis.

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  • September 7, 2023
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  • University of South Africa (Unisa)
  • Organisational Research Methodology
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IOP2601
ASSIGNMENT 3
SEMESTER 2
2023

Question 1:

1.1 In her study, the research psychologists stated “There is no difference in memory scores of
patients diagnosed with depression and those who are not.” This is a typical example of a/an null
hypothesis.



1.2 A test that allows us to assess differences between more than two group means and to examine
the effects of more than one independent variable is analysis of variance (ANOVA).



1.3 A chi-squared test is typically used to test for association between two categorical variables.



1.4 A null hypothesis is a negative statement about a possible difference between the variables that
you want to study.



1.5 The statement is false. The single-sample t-test is used when you have a single set of scores and
are investigating whether the mean of this sample equals a known mean.



1.6 The type of error that occurs when a researcher rejects a null hypothesis that is actually true is
called a Type I error.



1.7

a) H1: μ1 > μ2 is a directional hypothesis because it specifies a direction of the difference.

b) H1: μA < μB is a directional hypothesis for the same reason.

c) H1: μA ≠ μB is a nondirectional hypothesis because it doesn't specify a particular direction of the
difference.



1.8

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