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Data Science Interview Challenge
Data Science Interview Challenge
Theoretical Questions
1. In hypothesis testing, what is the null hypothesis, and what is the alternative hypothesis?
2. If the p-value in a hypothesis test is `0.03`, and the significance level (alpha) is set at `0.05`, do you reject or fail to reject the null hypothesis?
3. Explain what a 95% confidence interval means in the context of estimating a population mean.
4. If two variables have a correlation coefficient of `-0.85`, what does this tell you about their relationship?
5. Causation implies that:
6. In a scatter plot with points forming a straight line sloping upward from left to right, what type of correlation is likely present?
7. What statistical test is commonly used to determine if a correlation coefficient is significantly different from zero?
8. If you want to assess whether a set of data follows a normal distribution, which statistical test or plot is most appropriate?
9. In which real-life situation can the Chi-squared test be used?
10. Which of the following best describes the Central Limit Theorem (CLT)?
11. Which statement best captures the essence of the Law of Large Numbers?
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