Can you define data reduction?

74

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Can you define convex hull?

91

---

Can you explain recommender system?

95

---

Can you explain data preparation?

100

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Can you define a/b testing?

82

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What cross validation technique would you use on time series data set? Is it k-fold or loocv?

88

---

Can you explain interpolation and extrapolation?

112

---

Can you explain difference between data modeling and database design?

116

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Explain while working on a data set, how do you select important variables?

109

---

Explain how can you assess a good logistic model?

83

---

Define cluster sampling?

84

---

Explain data munging?

95

---

Explain root cause analysis?

90

---

How is true positive rate and recall related?

76

---

Explain the differences between bivariate and multivariate analysis?

106

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