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University of Nebraska, Lincoln *

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451

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Statistics

Date

Apr 3, 2024

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jpeg

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1

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928 PRACTICE EXAMS * Task 3 (7 points) Your supervisor suggested that you use the Pearson chi-square goodness-of-fit statistic to rank competing models for Clm_Count. This statistic is defined as n . 522 sz(yz ~ ) =1 M where y; is the value of the target variable for the ith observation in a given set of data, /i; is the corresponding predicted value, and n is the size of the data. (a) (2 points) Explain the rationale behind the Pearson statistic as a model performance metric. ANSWER: (b) (2 points) Explain how the Pearson statistic can be used to rank competing models for Clm_Count. ANSWER:
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