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Computational statistics - Quiz
Contributed by: Wyatt
  • 1. Computational statistics is a branch of statistics that focuses on the methods and techniques for analyzing data using computational tools and algorithms. It involves the development and application of statistical models, simulations, and algorithms to analyze and interpret complex datasets. Computational statistics plays a crucial role in various fields such as machine learning, data science, bioinformatics, and image analysis, providing researchers and analysts with the necessary tools to extract meaningful insights from large and complex datasets. By combining statistical theory with computer science techniques, computational statistics enables practitioners to efficiently and accurately analyze data, explore patterns and trends, and make informed decisions based on statistical inference and predictive modeling.

    What is a p-value in hypothesis testing?
A) The probability of obtaining results at least as extreme as the observed results, given that the null hypothesis is true
B) The significance level for accepting the null hypothesis
C) The population parameter being tested
D) The measure of confidence in the null hypothesis
  • 2. Which of the following is a parametric statistical test?
A) Kruskal-Wallis test
B) Wilcoxon signed-rank test
C) t-test
D) Mann-Whitney U test
  • 3. What is the purpose of regression analysis in statistics?
A) To examine the relationship between variables
B) To test for differences in means
C) To summarize categorical data
D) To identify outliers in a dataset
  • 4. What does the correlation coefficient measure?
A) The variability within groups
B) The spread of the data
C) The central tendency of a dataset
D) The strength and direction of a linear relationship between two variables
  • 5. What is the purpose of a confidence interval in statistics?
A) To determine the probability of an event occurring
B) To compare two independent groups
C) To estimate the range within which the population parameter is likely to fall
D) To predict future data points
  • 6. Which type of sampling technique involves randomly selecting subjects from a population?
A) Cluster sampling
B) Convenience sampling
C) Systematic sampling
D) Simple random sampling
  • 7. Which regression technique is used when the dependent variable is binary?
A) Linear regression.
B) Polynomial regression.
C) Logistic regression.
D) Ridge regression.
  • 8. What is the significance level in hypothesis testing?
A) The probability of rejecting the null hypothesis when it is actually true
B) The level of confidence in the alternative hypothesis
C) The measure of correlation between two variables
D) The margin of error in the sample mean
  • 9. Which statistical technique is used to predict the value of a dependent variable based on one or more independent variables?
A) Factor analysis.
B) Cluster analysis.
C) Regression analysis.
D) Time series analysis.
  • 10. Which statistical test is used to determine if there is a significant association between two categorical variables?
A) Chi-square test.
B) Regression analysis.
C) T-test.
D) ANOVA.
  • 11. What is the difference between correlation and causation?
A) Correlation indicates a relationship between variables, while causation implies one variable causes a change in the other
B) Correlation refers to linear relationships, while causation refers to non-linear relationships
C) Correlation is used for categorical data, while causation is used for continuous data
D) Correlation measures the strength of a relationship, while causation measures the direction
  • 12. What is the purpose of the Central Limit Theorem in statistics?
A) To state that the sampling distribution of the sample mean approaches a normal distribution as the sample size increases
B) To calculate the range of a dataset
C) To compare two different samples
D) To determine the variability within groups
  • 13. In statistical hypothesis testing, what is the null hypothesis?
A) A statement that there is no significant difference between specified populations
B) The hypothesis that the researcher believes to be true
C) The hypothesis that is tested using a one-tailed test
D) A statement that predicts an outcome in an experiment
  • 14. Which statistical technique is used to deal with missing values in a dataset?
A) Outlier detection.
B) Feature engineering.
C) Normalization.
D) Imputation.
  • 15. Which statistical test should be used to compare the means of more than two independent groups?
A) Regression analysis
B) T-test
C) Chi-square test
D) ANOVA
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