Descriptive Statistics

Basics

Q1. What do you mean by Data?

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Basics

Q2. Define dataset.

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Basics

Q3. What are the two main types of variables?

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Examining Distribution - Univariate

Q4. How can we summarize distribution of categorical variable?

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Examining Distribution - Univariate

Q5. State some methods for visualizing the numerical summaries of categorical data?

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Examining Distribution - Univariate

Q6. State the difference between pie chart and bar chart?

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Examining Distribution - Univariate

Q7. What are graphical methods to visualize the distribution of a quantitative variable?

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Examining Distribution - Univariate

Q8. Define histogram?

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Examining Distribution - Univariate

Q9. Write the steps of plotting histogram?

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Examining Distribution - Univariate

Q10. How can we numerically summarize a distribution represented by histogram?

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Examining Distribution - Univariate

Q11. What insights can be gained from examining the shape of a histogram?

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Examining Distribution - Univariate

Q12. What is the difference between a unimodal, a bimodal and a multimodal histogram?

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Examining Distribution - Univariate

Q13. State the modality of an uniform distribution?

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Examining Distribution - Univariate

Q14. Under what conditions does a distribution become skewed to the right?

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Examining Distribution - Univariate

Q15. What does right skewed histogram indicates about the dataset?

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Examining Distribution - Univariate

Q16. Can you draw a right skewed histogram?

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Examining Distribution - Univariate

Q17. State the relationship between mean, median and mode in case of skewed right distributions?

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Examining Distribution - Univariate

Q18. State a real-life scenario of a distribution which is skewed right?

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Examining Distribution - Univariate

Q19. Under what conditions does a distribution become skewed to the left?

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Examining Distribution - Univariate

Q20. What does left skewed histogram indicates about the dataset?

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Examining Distribution - Univariate

Q21. Can you draw a left skewed histogram?

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Examining Distribution - Univariate

Q22. State the relationship between mean, median and mode in case of skewed left distributions?

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Examining Distribution - Univariate

Q23. State the relationship between mean, median and mode in case of symmetric distributions?

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Examining Distribution - Univariate

Q24. State a real-life scenario of a distribution which is skewed left?

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Examining Distribution - Univariate

Q25. What is a stemplot? What are benefits of using it?

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Examining Distribution - Univariate

Q26. State the main numerical measures of center of a quantitative variable distribution?

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Examining Distribution - Univariate

Q27. What is mode of a distribution?

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Examining Distribution - Univariate

Q28. What is mean of a distribution?

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Examining Distribution - Univariate

Q29. What is median of a distribution?

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Examining Distribution - Univariate

Q30. How can we calculate median of a distribution?

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Examining Distribution - Univariate

Q31. How can we calculate median of a distribution? (Part 2)

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Examining Distribution - Univariate

Q32. State the main difference between mean and median?

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Examining Distribution - Univariate

Q33. How can we decide which measure should we choose as center of distribution?

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Examining Distribution - Univariate

Q34. What are commonly used measures of spread?

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Examining Distribution - Univariate

Q35. What do you mean by range of a distribution?

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Examining Distribution - Univariate

Q36. What is IQR? How can we calculate it?

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Examining Distribution - Univariate

Q37. Can we use IQR to detect outliers?

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Examining Distribution - Univariate

Q38. How to deal with outliers in the data?

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Examining Distribution - Univariate

Q39. What are the five-number summary statistics of a distribution?

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Examining Distribution - Univariate

Q40. What is a box-plot?

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Examining Distribution - Univariate

Q41. State one benefit of using box-plot?

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Examining Distribution - Univariate

Q42. What does the standard deviation represent in a distribution?

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Examining Distribution - Univariate

Q43. What is the benefit of using IQR over SD for measure of spread?

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Examining Distribution - Univariate

Q44. Given the array $[1,5,3,2,4,4]$, find its mean, median, variance, and standard deviation.

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Examining Distribution - Univariate

Q45. How do we determine which numerical summaries to use for describing a distribution?

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Examining Distribution - Univariate

Q46. State standard deviation rule?

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Examining Relationships - Multivariate

Q47. Define explanatory and response variable?

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Examining Relationships - Multivariate

Q48. How can we examine the relationship between a categorical explanatory variable and quantitative response variable?

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Examining Relationships - Multivariate

Q49. How can we examine the relationship between a categorical explanatory variable and categorical response variable?

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Examining Relationships - Multivariate

Q1. What do you mean by Data?

Q2. Define dataset.

Q3. What are the two main types of variables?

Q4. How can we summarize distribution of categorical variable?

Q5. State some methods for visualizing the numerical summaries of categorical data?

Q6. State the difference between pie chart and bar chart?

Q7. What are graphical methods to visualize the distribution of a quantitative variable?

Q8. Define histogram?

Q9. Write the steps of plotting histogram?

Q10. How can we numerically summarize a distribution represented by histogram?

Q11. What insights can be gained from examining the shape of a histogram?

Q12. What is the difference between a unimodal, a bimodal and a multimodal histogram?

Q13. State the modality of an uniform distribution?

Q14. Under what conditions does a distribution become skewed to the right?

Q15. What does right skewed histogram indicates about the dataset?

Q16. Can you draw a right skewed histogram?

Q17. State the relationship between mean, median and mode in case of skewed right distributions?

Q18. State a real-life scenario of a distribution which is skewed right?

Q19. Under what conditions does a distribution become skewed to the left?

Q20. What does left skewed histogram indicates about the dataset?

Q21. Can you draw a left skewed histogram?

Q22. State the relationship between mean, median and mode in case of skewed left distributions?

Q23. State the relationship between mean, median and mode in case of symmetric distributions?

Q24. State a real-life scenario of a distribution which is skewed left?

Q25. What is a stemplot? What are benefits of using it?

Q26. State the main numerical measures of center of a quantitative variable distribution?

Q27. What is mode of a distribution?

Q28. What is mean of a distribution?

Q29. What is median of a distribution?

Q30. How can we calculate median of a distribution?

Q31. How can we calculate median of a distribution? (Part 2)

Q32. State the main difference between mean and median?

Q33. How can we decide which measure should we choose as center of distribution?

Q34. What are commonly used measures of spread?

Q35. What do you mean by range of a distribution?

Q36. What is IQR? How can we calculate it?

Q37. Can we use IQR to detect outliers?

Q38. How to deal with outliers in the data?

Q39. What are the five-number summary statistics of a distribution?

Q40. What is a box-plot?

Q41. State one benefit of using box-plot?

Q42. What does the standard deviation represent in a distribution?

Q43. What is the benefit of using IQR over SD for measure of spread?

Q44. Given the array $[1,5,3,2,4,4]$, find its mean, median, variance, and standard deviation.

Q45. How do we determine which numerical summaries to use for describing a distribution?

Q46. State standard deviation rule?

Q47. Define explanatory and response variable?

Q48. How can we examine the relationship between a categorical explanatory variable and quantitative response variable?

Q49. How can we examine the relationship between a categorical explanatory variable and categorical response variable?

Q50. How can we examine the relationship between a numerical explanatory variable and numerical response variable?

Q51. What is Simpsons Paradox?

Q52. Why Does Simpson’s Paradox Occur?