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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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Uploaded by DrFireDonkey38

PRACTICE EXAMS 925 & Task 1 (10 points) Your boss has asked you to review and understand the data to prepare for subsequent analysis. To begin with, you notice that there are two variables in the data that measure vehicle age in some way. (a) (2 points) Identify these two variables and explain whether one is more granular than the other. ANSWER: (b) (2 points) Describe one univariate technique that can be used to explore the two variables as factor variables. ANSWER: The following shows the mean of Clm_Count over different values of VAgeCat: VAgeCat mean n 0 0.0724 3079 1 0.0984 681 2 0.116 646 3 0.0869 771 4 0.0595 924 5 0.0275 1164 6 0.0183 218 (c) (2 points) Explain why it may be more desirable to use VAgeCat in place of VAgecat1 for constructing predictive models for Clm_Count. ANSWER:

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