Data Science Questions and Answers for freshers on “Types of Questions”
1. Accurate prediction depends heavily on measuring the right variables.
a) True
b) False
Answer: a
Explanation: Prediction is very hard, especially for future references.
2. Point out the correct statement.
a) Descriptive analysis can be more useful for defining future studies
b) Correlation does imply causation
c) Inference is commonly the goal of statistical model
d) None of the mentioned
Answer: b
Explanation: Inference depends heavily on the sampling scheme.
3. Which of the following uses relatively small amount of data to estimate about bigger population?
a) Inferential
b) Exploratory
c) Causal
d) None of the mentioned
Answer: a
Explanation: Inferential statistics is concerned with making predictions or inferences about a population from observations and analyses of a sample.
4. Which of the following analysis helps out to find the effect of variable change?
a) Inferential
b) Exploratory
c) Causal
d) None of the mentioned
Answer: c
Explanation: Causal Analysis provides the real reason why things happen and hence allows focused change activity.
5. Point out the correct statement.
a) Exploratory analyses are not usually the final way
b) Inferential models are useful for discovering new connection
c) Inference involves estimating uncertainty
d) All of the mentioned
Answer: c
Explanation: Statistical inference is the process of deducing properties of an underlying distribution by analysis of data.
6. Which of the following relationship are usually identified as average effects?
a) Descriptive
b) Causal
c) Predictive
d) None of the mentioned
Answer: b
Explanation: A correlation is a measure or degree of relationship between two variables.
7. Which of the following analysis is usually modeled by deterministic set of equations?
a) Predictive
b) Causal
c) Mechanistic
d) All of the mentioned
Answer: c
Explanation: Equations are based on physical/engineering science.
8. Which of the following analysis are incredibly hard to infer?
a) Inferential
b) Exploratory
c) Causal
d) Mechanistic
Answer: d
Explanation: Mechanistic analysis are hard to infer except for simple simulations.