Biostatistics & Research Methods
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By
Waqas Latif h
M.Sc. Biostatisticsh
Data Analyst (Quality Enhancement Cell) University
h h h h h
hof Health Sciences, Lahore
h h h
E-mail:
h
,Inferential Statistics
h
➢ Analysis of Categorical data
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1. Chi-Square Goodness-of-Fit Test
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2. Chi-Square test of Independence
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➢ Correlation Analysis
h
, INTRODUCTION
Parametric & non- h h
parametric tests are used when the outcome res
h h h h h h h
ponse is quantitative and our interest is to deter
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mine whether there are any statistical differences
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between groups (which are categorical)
h h h h h
, Parametric Tests vs. Non-parametric Tests
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Non-
Goals Parametric Test h
parametric h
test
Compare one group to a hypothetica One-sample t test
h h h h h h h Sign test or Wilcoxon
h h h h
l value or reference
h h h signed-ranked test h
value
Compare two independent groups
h h h Independent t test
h h Mann-Whitney U h
test
Compare two paired groups
h h h Paired t test
h h Wilcoxon signed- h
ranked test h
h h h
By
Waqas Latif h
M.Sc. Biostatisticsh
Data Analyst (Quality Enhancement Cell) University
h h h h h
hof Health Sciences, Lahore
h h h
E-mail:
h
,Inferential Statistics
h
➢ Analysis of Categorical data
h h h
1. Chi-Square Goodness-of-Fit Test
h h
2. Chi-Square test of Independence
h h h
➢ Correlation Analysis
h
, INTRODUCTION
Parametric & non- h h
parametric tests are used when the outcome res
h h h h h h h
ponse is quantitative and our interest is to deter
h h h h h h h h
mine whether there are any statistical differences
h h h h h h
between groups (which are categorical)
h h h h h
, Parametric Tests vs. Non-parametric Tests
h h h h
Non-
Goals Parametric Test h
parametric h
test
Compare one group to a hypothetica One-sample t test
h h h h h h h Sign test or Wilcoxon
h h h h
l value or reference
h h h signed-ranked test h
value
Compare two independent groups
h h h Independent t test
h h Mann-Whitney U h
test
Compare two paired groups
h h h Paired t test
h h Wilcoxon signed- h
ranked test h
