Experimental Design and Statistical Inference Quiz
Test your knowledge on key concepts of experimental design, statistical tests, and research methodology with this quiz.
#1
Which of the following is a key component of experimental design?
Random assignment
Descriptive statistics
Correlation analysis
Factorial design
#2
What is the primary purpose of the Institutional Review Board (IRB) in experimental research?
To analyze and interpret study results
To ensure ethical treatment of human subjects
To perform data collection
To determine the appropriate statistical analysis
#3
What is the purpose of a control group in an experiment?
To receive the experimental treatment
To provide a baseline for comparison
To collect qualitative data
To eliminate confounding variables
#4
Which statistical test is appropriate for comparing means of two independent groups?
Paired t-test
ANOVA
Chi-square test
Independent samples t-test
#5
In a factorial design, what does a 2x3 design represent?
Two levels of one independent variable and three levels of another
Two independent variables with a total of three levels
Two conditions with three replications
Two experimental groups with three control groups
#6
Which type of probability sampling method involves selecting every kth element from a list?
Stratified sampling
Systematic sampling
Cluster sampling
Convenience sampling
#7
Which of the following is a non-parametric statistical test for comparing two independent samples?
Student's t-test
Mann-Whitney U test
ANOVA
Chi-square test
#8
What does p-value signify in hypothesis testing?
Probability of Type I error
Probability of Type II error
Level of significance
Margin of error
#9
What is the purpose of randomization in experimental design?
To increase statistical power
To reduce selection bias
To ensure external validity
To control for confounding variables
#10
What is the purpose of blocking in experimental design?
To increase the sample size
To control for extraneous variables
To ensure internal validity
To eliminate randomization
#11
What does the term 'statistical power' refer to in hypothesis testing?
The probability of rejecting a false null hypothesis
The probability of accepting a true null hypothesis
The sample size required for significance
The probability of Type I error
#12
What is the purpose of a pilot study in experimental research?
To test the statistical hypotheses
To obtain a small sample size for the main study
To identify and address potential issues with the study design
To analyze the final results before publication
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