Biostatistics MCQs

1. What is the term for a measure that describes the central value of a dataset?
a) Variance
b) Mean
c) Standard deviation
d) Range
Answer: b) Mean

2. Which measure of central tendency is most affected by extreme values or outliers?
a) Mean
b) Median
c) Mode
d) Variance
Answer: a) Mean

3. What is the term for the middle value in a dataset when it is ordered from smallest to largest?
a) Mean
b) Median
c) Mode
d) Range
Answer: b) Median

4. What measure of central tendency is defined as the value that appears most frequently in a dataset?
a) Mean
b) Median
c) Mode
d) Variance
Answer: c) Mode

5. What is the term for the measure of dispersion that represents the average squared deviation from the mean?
a) Variance
b) Standard deviation
c) Range
d) Interquartile range
Answer: a) Variance

6. What is the square root of the variance called?
a) Range
b) Mean
c) Standard deviation
d) Median
Answer: c) Standard deviation

7. What is the term for the difference between the highest and lowest values in a dataset?
a) Variance
b) Range
c) Standard deviation
d) Interquartile range
Answer: b) Range

8. What is the term for the measure that divides a dataset into four equal parts?
a) Quartiles
b) Deciles
c) Percentiles
d) Median
Answer: a) Quartiles

9. What is the term for a dataset where the distribution is symmetrical and bell-shaped?
a) Normal distribution
b) Skewed distribution
c) Uniform distribution
d) Exponential distribution
Answer: a) Normal distribution

10. What is the probability distribution used to model the number of successes in a fixed number of trials?
a) Binomial distribution
b) Normal distribution
c) Poisson distribution
d) Exponential distribution
Answer: a) Binomial distribution

11. What is the term for the probability of a given outcome occurring in a dataset?
a) Probability
b) P-value
c) Confidence interval
d) Risk
Answer: a) Probability

12. What is the term for the probability of observing a result as extreme as or more extreme than the one observed, given that the null hypothesis is true?
a) P-value
b) Confidence interval
c) Power
d) Significance level
Answer: a) P-value

13. What is the term for the range within which a population parameter is expected to lie with a certain level of confidence?
a) Confidence interval
b) Hypothesis test
c) P-value
d) Effect size
Answer: a) Confidence interval

14. What is the term for the likelihood of rejecting the null hypothesis when it is true?
a) Type I error
b) Type II error
c) Power
d) Significance level
Answer: a) Type I error

15. What is the term for the likelihood of failing to reject the null hypothesis when it is false?
a) Type II error
b) Type I error
c) Power
d) Significance level
Answer: a) Type II error

16. What is the term for the probability of correctly rejecting a false null hypothesis?
a) Power
b) Significance level
c) Type I error
d) Type II error
Answer: a) Power

17. What is the term for a statistical test that assesses whether there is a significant difference between the means of two groups?
a) T-test
b) Chi-square test
c) ANOVA
d) Regression analysis
Answer: a) T-test

18. What is the term for a statistical test used to compare the variances of two or more groups?
a) F-test
b) T-test
c) Chi-square test
d) Z-test
Answer: a) F-test

19. What is the term for a statistical test used to determine if there is a significant association between two categorical variables?
a) Chi-square test
b) T-test
c) ANOVA
d) Regression analysis
Answer: a) Chi-square test

20. What is the term for a measure that assesses the strength and direction of the linear relationship between two variables?
a) Correlation coefficient
b) P-value
c) Confidence interval
d) Effect size
Answer: a) Correlation coefficient

21. What is the term for a statistical model that describes the relationship between a dependent variable and one or more independent variables?
a) Regression analysis
b) ANOVA
c) Chi-square test
d) T-test
Answer: a) Regression analysis

22. What is the term for the proportion of total variability in the dependent variable that is explained by the independent variable(s) in a regression model?
a) R-squared
b) P-value
c) Beta coefficient
d) Standard error
Answer: a) R-squared

23. What is the term for the statistical technique used to test the significance of the relationship between variables?
a) Hypothesis testing
b) Descriptive statistics
c) Exploratory data analysis
d) Data mining
Answer: a) Hypothesis testing

24. What is the term for the statistical measure that indicates how much individual data points differ from the mean?
a) Standard deviation
b) Variance
c) Range
d) Interquartile range
Answer: a) Standard deviation

25. What is the term for the average of the squared deviations from the mean in a dataset?
a) Variance
b) Standard deviation
c) Range
d) Mean
Answer: a) Variance

26. What is the term for a graphical representation of the distribution of a dataset?
a) Histogram
b) Scatter plot
c) Box plot
d) Bar chart
Answer: a) Histogram

27. What is the term for a graphical representation that shows the relationship between two continuous variables?
a) Scatter plot
b) Histogram
c) Box plot
d) Pie chart
Answer: a) Scatter plot

28. What is the term for a statistical technique used to assess the differences between more than two group means?
a) ANOVA
b) T-test
c) Chi-square test
d) Regression analysis
Answer: a) ANOVA

29. What is the term for the measure of the average distance of each data point from the mean?
a) Standard deviation
b) Variance
c) Range
d) Interquartile range
Answer: a) Standard deviation

30. What is the term for a hypothesis test where the null hypothesis is rejected only if the test statistic is beyond a certain critical value?
a) One-tailed test
b) Two-tailed test
c) Chi-square test
d) T-test
Answer: a) One-tailed test

31. What is the term for the range of values within which a population parameter is expected to lie, with a specified level of confidence?
a) Confidence interval
b) Hypothesis test
c) P-value
d) Effect size
Answer: a) Confidence interval

32. What is the term for the proportion of variance in a dependent variable that is accounted for by an independent variable in a regression model?
a) R-squared
b) P-value
c) Beta coefficient
d) Standard error
Answer: a) R-squared

33. What is the term for the process of selecting a subset of individuals from a population to estimate characteristics of the whole population?
a) Sampling
b) Data mining
c) Hypothesis testing
d) Regression analysis
Answer: a) Sampling

34. What is the term for a measure of the strength and direction of the linear relationship between two variables?
a) Correlation coefficient
b) P-value
c) Confidence interval
d) Effect size
Answer: a) Correlation coefficient

35. What is the term for the statistical technique used to determine if the differences between groups are statistically significant?
a) Hypothesis testing
b) Descriptive statistics
c) Exploratory data analysis
d) Data mining
Answer: a) Hypothesis testing

36. What is the term for the range of values within which a population parameter is expected to lie with a certain level of confidence?
a) Confidence interval
b) Hypothesis test
c) P-value
d) Effect size
Answer: a) Confidence interval

37. What is the term for the statistical test that assesses the goodness of fit between observed and expected frequencies in categorical data?
a) Chi-square test
b) T-test
c) ANOVA
d) Regression analysis
Answer: a) Chi-square test

38. What is the term for a measure that summarizes the center of a dataset?
a) Central tendency
b) Dispersion
c) Distribution
d) Correlation
Answer: a) Central tendency

39. What is the term for the degree to which two variables move in relation to each other?
a) Correlation
b) Regression
c) Variance
d) Distribution
Answer: a) Correlation

40. What is the term for a graphical display of the five-number summary of a dataset?
a) Box plot
b) Histogram
c) Scatter plot
d) Bar chart
Answer: a) Box plot

41. What is the term for a statistical test used to compare the means of three or more groups?
a) ANOVA
b) T-test
c) Chi-square test
d) Regression analysis
Answer: a) ANOVA

42. What is the term for the analysis that describes the data without making any conclusions?
a) Descriptive statistics
b) Inferential statistics
c) Exploratory data analysis
d) Predictive modeling
Answer: a) Descriptive statistics

43. What is the term for the statistical error that occurs when the null hypothesis is rejected when it is true?
a) Type I error
b) Type II error
c) Power
d) Significance level
Answer: a) Type I error

44. What is the term for the statistical error that occurs when the null hypothesis is not rejected when it is false?
a) Type II error
b) Type I error
c) Power
d) Significance level
Answer: a) Type II error

45. What is the term for the likelihood of correctly rejecting a false null hypothesis?
a) Power
b) Significance level
c) Type I error
d) Type II error
Answer: a) Power

46. What is the term for a hypothesis test that evaluates whether a parameter is greater than or less than a certain value?
a) One-tailed test
b) Two-tailed test
c) Chi-square test
d) T-test
Answer: a) One-tailed test

47. What is the term for a hypothesis test that evaluates whether a parameter is significantly different from a certain value?
a) Two-tailed test
b) One-tailed test
c) Chi-square test
d) T-test
Answer: a) Two-tailed test

48. What is the term for a statistical model that predicts the value of one variable based on another variable?
a) Regression analysis
b) ANOVA
c) Chi-square test
d) T-test
Answer: a) Regression analysis

49. What is the term for a measure of how closely data points cluster around a central value?
a) Variability
b) Central tendency
c) Dispersion
d) Correlation
Answer: a) Variability

50. What is the term for a measure of the strength and direction of the linear relationship between two variables?
a) Correlation coefficient
b) P-value
c) Confidence interval
d) Effect size
Answer: a) Correlation coefficient

Biostatistics MCQs

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