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Answer Statistics Questions for Spokeo DS Role Quiz
Timed Statistics Quiz: Short-Answer Concepts
Answer the following independent questions succinctly. Assume standard statistical definitions and that symbols have their usual meanings.
- What are the expectation and variance of a Poisson(λ) distribution?
- Given sample size n and known population standard deviation σ, write the 95% confidence interval for the population mean.
- When should a two-sample t-test be used instead of a z-test?
- State the Central Limit Theorem (CLT) and give one practical implication.
- Interpret a p-value of 0.03 in the context of hypothesis testing.
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Core dilemma
Assessing foundational statistical understanding and the ability to articulate practical implications and assumptions, rather than mere memorization of formulas or definitions.
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Answer Statistics Questions for Spokeo DS Role Quiz
Timed Statistics Quiz: Short-Answer Concepts
Answer the following independent questions succinctly. Assume standard statistical definitions and that symbols have their usual meanings.
- What are the expectation and variance of a Poisson(λ) distribution?
- Given sample size n and known population standard deviation σ, write the 95% confidence interval for the population mean.
- When should a two-sample t-test be used instead of a z-test?
- State the Central Limit Theorem (CLT) and give one practical implication.
- Interpret a p-value of 0.03 in the context of hypothesis testing.