#1
Which of the following is a measure of central tendency?
Variance
Standard Deviation
Mean
Regression
#2
What is the purpose of a scatter plot in data analysis?
To show the distribution of categorical data
To display the relationship between two variables
To summarize a dataset using summary statistics
To perform hypothesis testing
#3
What is the primary purpose of exploratory data analysis (EDA) in statistics?
To confirm hypotheses
To make predictions
To visually explore and understand data patterns
To perform statistical tests
#4
What does the term 'ANOVA' stand for in statistics?
Analysis of Variance
Association of Variables
Advanced Normalization Operation
Average Numeric Output Value Analysis
#5
In statistics, what does the term 'p-value' represent?
Probability value
Population value
Percentage value
Preliminary value
#6
What is the purpose of stratified sampling in experimental design?
To ensure randomness
To control confounding variables
To simplify data analysis
To increase sample size
#7
In regression analysis, what does the coefficient of determination (R-squared) measure?
Effect size
Prediction accuracy
Causation strength
Confidence interval
#8
Which type of probability sampling method involves dividing the population into subgroups or strata?
Simple random sampling
Systematic sampling
Stratified sampling
Cluster sampling
#9
What is the purpose of a histogram in data analysis?
To display the relationship between two variables
To show the distribution of categorical data
To summarize a dataset using summary statistics
To illustrate the frequency distribution of a continuous variable
#10
Which statistical test is used to determine if there is a significant association between two categorical variables?
Independent t-test
Pearson correlation
Chi-square test
ANOVA
#11
Which statistical test is appropriate for comparing means of two independent groups?
Paired t-test
Chi-square test
ANOVA
Independent t-test
#12
What is the purpose of a control group in an experiment?
To provide a baseline for comparison
To manipulate variables
To collect observational data
To ensure statistical significance
#13
What does a box plot (box-and-whisker plot) primarily depict?
Central tendency
Dispersion
Outliers
Correlation
#14
In a factorial experiment, what does each factor represent?
A level of significance
An independent variable
A dependent variable
A type of statistical test
#15
What is the purpose of a two-way ANOVA in experimental design?
To compare means of two independent groups
To analyze the effects of two independent variables
To test for normality in the data
To assess correlation between two variables
#16
In statistical hypothesis testing, what does the term 'Type I error' refer to?
Rejecting a true null hypothesis
Failing to reject a false null hypothesis
Accepting a false alternative hypothesis
Failing to accept a true alternative hypothesis