lambda - 2024 ACF Winter at Online

Question

An exponent denoted with this letter is the critical parameter of the Box–Cox transformation, which converts non-normal dependent variables to a normal distribution. For 10 points each:

[10m] Name this non-theta Greek letter that also parameterizes the Poisson distribution, as it equals both the expected value and variance.

ANSWER: lambda

[10e] If lambda equals zero, then the Box–Cox transformation just involves applying this function to the input data to make it normal. This function is the inverse of exponentiation.

ANSWER: logarithm [accept natural logarithm or ln (“lawn”)]

[10h] This plot is used to graphically check whether data is normal, as two identically distributed groups of data follow a 45-degree line. Comparing heavy-tailed and normal distributions on this plot produces a nearly horizontal line.

ANSWER: Q-Q plot [or quantile-quantile plot]

Back to bonuses

Summary


2024 ACF Winter at UC Berkeley	2024-11-16	Y	3	20.00	100%	100%	0%
2024 ACF Winter at Clemson	2024-11-16	Y	7	12.86	86%	43%	0%
2024 ACF Winter at Clemson	2024-11-16	Y	7	14.29	86%	0%	57%
2024 ACF Winter at Lehigh	2024-11-16	Y	7	21.43	100%	71%	43%
2024 ACF Winter at Northwestern	2024-11-16	Y	9	16.67	100%	44%	22%
2024 ACF Winter at Online	2024-11-16	Y	8	15.00	100%	38%	13%
2024 ACF Winter at Online	2024-11-16	Y	3	13.33	67%	33%	33%
2024 ACF Winter at Central Florida	2024-11-16	Y	5	12.00	100%	20%	0%
2024 ACF Winter at Oxford	2024-11-16	Y	10	20.00	100%	70%	30%
2024 ACF Winter at Brandeis	2024-11-16	Y	10	17.00	90%	70%	10%

Data


Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Mississippi State	McGill E	0	0	10	10
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Vassar B	Arkansas	0	10	0	10
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	WUSTL A	0	10	0	10
Central Oklahoma	Vassar A	10	10	0	20
Central Oklahoma	WUSTL A	0	10	0	10
Iowa	Vassar A	0	10	0	10
Texas A	McGill E	0	10	0	10
NYU B	Mississippi State	10	10	0	20
NYU A	Texas D	0	10	0	10
Texas C	Ole Miss	10	10	10	30
Texas B	Colorado College	10	10	0	20