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Data Science Interview Challenge
course content

Course Content

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?

Select the correct answer

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?

Select the correct answer

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.

Select the correct answer

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?

Select the correct answer

Causation implies that:

Causation implies that:

Select the correct answer

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?

Select the correct answer

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?

Select the correct answer

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?

Select the correct answer

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

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

Select the correct answer

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

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

Select the correct answer

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

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

Select the correct answer

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Section 6. Chapter 6
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