Answers to Frequently Asked Questions

We request that papers using advice from the SCCA Q&A files include an acknowledgment to 'the SCCA operated at the Department of Statistics, Penn State University, M.G. Akritas (Director).'

• Question 1: Comparison of Proportions
• Question 2: Bayesian References
• Question 3: Number of Parameters Greater Than Sample
• Question 4: Likelihood Ratio Statistic for Poisson Counts
• Question 5: Comparing the Rate of Source Signals in the Presence of Noise from Background Signals
• Question 6: Comparing Source Rates Obtained with Different Telescope/Detector Systems in the Presence of Noise from Background Signals
• Question 7: Use of Chi-Squared for Parameter Estimation and Confidence Intervals
• Question 8: Chi-Square Confidence Intervals for an Additional Parameter
• Question 9: Bootstrap or the Dressler-Shectman shuffling?
• Question 10: Confidence Intervals for the Centroid and Ellipticity
• Question 11: Testing for Partial Correlation with Censored Data
• Question 12: Clustering Algorithms
• Question 13: On Robust Estimation
• Question 14: Comparing Two Bivariate Censored Samples
• Question 15: Confidence Intervals from Truncated Data
• Question 16: Flux vs. Flux, or Luminosity vs. Luminosity
• Question 17: Software for Two-Sample Testing
• Question 18: Chi-Square and Kolmogorov-Smirnov with Measurement Errors
• Question 19: Principal Component Analysis for Variables with Known Measurement Errors
• Question 20: Linear Regression for Astronomical Data with Measurement Errors
• Question 21: Rank Sum Test for Bivariate Samples
• Question 22: Goodness-of-fit with Truncated Data
• Question 23: Comparison of Samples Allowing for Covariate Effects
• Question 24: Biased Sampling
• Question 25: Intrinsic Scatter and Debiased Sample Variance
• Question 26: Comparing Shapes and Sizes
• Question 27: Confidence Intervals for Moments
• Question 28: References for Givens Rotations
• Question 29: Goodness-of-fit With Doubly Censored Data
• Question 30: Outlier detection and bump hunting
• Question 31: Comparing populations with measurement error
• Question 32: Variance Function Estimation: Measurement Error only in Y
• Question 33: Chi-Square Degrees of Freedom and Question 7
• Question 34: Searching for Periodicities in Unevenly Spaced Data
• Question 35: Linear Regressions and the Elliptical Galaxy Fundamental Plane
• Question 36: Estimating the Lag in Two Time Series
• Question 37: Multiple Regression for Astronomical Data with Measurement Errors

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