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Data Science Interview Challenge
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Data Science Interview Challenge

Data Science Interview Challenge

1. Python
IntroductionChallenge 1: List ComprehensionChallenge 2: String ManipulationChallenge 3: Dictionary ManipulationChallenge 4: Nested LoopsChallenge 5: ClassesTheoretical Questions
2. NumPy
Challenge 1: Array CreationChallenge 2: Array ManipulationChallenge 3: Statistical InsightsChallenge 4: Handling Missing ValuesChallenge 5: Subarray SortingTheoretical Questions
3. Pandas
Challenge 1: DataFrame CreationChallenge 2: Data GroupingChallenge 3: Indexing and MultiIndexingChallenge 4: Altering DataFrameChallenge 5: Iterating Over DataTheoretical Questions
4. Matplotlib
Challenge 1: Fundamentals of PlottingChallenge 2: Other Graph TypesChallenge 3: SubplotsChallenge 4: Customizing PlotsChallenge 5: Adding Text to PlotsTheoretical Questions
5. Seaborn
Challenge 1: Visualizing DistributionsChallenge 2: Exploring Categorical DataChallenge 3: Relational PlotsChallenge 4: Regression PlotsChallenge 5: Matrix PlotsTheoretical Questions
6. Statistics
Challenge 1: Probabilities and DistributionsChallenge 2: Bayes' TheoremChallenge 3: Hypothesis TestingChallenge 4: Confidence IntervalsChallenge 5: CorrelationTheoretical Questions
7. Scikit-learn
Challenge 1: Data ScalingChallenge 2: Basic Model CreationChallenge 3: PipelinesChallenge 4: Cross-validationChallenge 5: Hyperparameter TuningTheoretical Questions

bookTheoretical 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?
In hypothesis testing, what is the null hypothesis, and what is the alternative hypothesis?

In hypothesis testing, what is the null hypothesis, and what is the alternative hypothesis?

Виберіть правильну відповідь

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?

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?

Виберіть правильну відповідь

Explain what a 95% confidence interval means in the context of estimating a population mean.

Explain what a 95% confidence interval means in the context of estimating a population mean.

Виберіть правильну відповідь

If two variables have a correlation coefficient of `-0.85`, what does this tell you about their relationship?

If two variables have a correlation coefficient of -0.85, what does this tell you about their relationship?

Виберіть правильну відповідь

Causation implies that:

Causation implies that:

Виберіть правильну відповідь

In a scatter plot with points forming a straight line sloping upward from left to right, what type of correlation is likely present?

In a scatter plot with points forming a straight line sloping upward from left to right, what type of correlation is likely present?

Виберіть правильну відповідь

What statistical test is commonly used to determine if a correlation coefficient is significantly different from zero?

What statistical test is commonly used to determine if a correlation coefficient is significantly different from zero?

Виберіть правильну відповідь

If you want to assess whether a set of data follows a normal distribution, which statistical test or plot is most appropriate?

If you want to assess whether a set of data follows a normal distribution, which statistical test or plot is most appropriate?

Виберіть правильну відповідь

In which real-life situation can the Chi-squared test be used?

In which real-life situation can the Chi-squared test be used?

Виберіть правильну відповідь

Which of the following best describes the Central Limit Theorem (CLT)?

Which of the following best describes the Central Limit Theorem (CLT)?

Виберіть правильну відповідь

Which statement best captures the essence of the Law of Large Numbers?

Which statement best captures the essence of the Law of Large Numbers?

Виберіть правильну відповідь

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