Statistics 753 Presentation

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Statistics 753 Presentation
Dec. 15th, 2006 Longitudinal Data Analysis Case
Study

• Lin Fang
• Weiwei Xiong
• Jinhui Ma

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Content

• Introduction
• Data Description
• Data Analysis
• Discussion

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Introduction

• National Longitudinal Survey of Children and
  Youth (NLSCY)
• Long-term study of Canadian children
• Begin in 1994
• Conducted by Statistics Canada
• Data in Our Study
• Cycles 1 through cycles 4
• A subset of Synthetic files taken according 4
  criteria
• 1033 records

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Introduction

• Objective
• Estimate the proportion of Canadian children aged
  2 to 5 years old in daycare
• Estimate the variance

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Data Description
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Data Description
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Data Description
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Data Description
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Data Analysis

• Model Fitting
• Logistic model
• Response 1-Daycare, 0-No Daycare
• Covariates Family, Age, Sibling, URcode and
  Working
• Missing values 23 item nonresponse
• Reweight

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Data Analysis

• Daycare Proportion Estimate 47.06
• Standard Error Estimate 0.27
• Jackknife Method

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Discussion

• Estimates Evaluation
• Proportion estimate higher than 42 cited from
  Statistics Canada
• Standard Error too large
• Possible reasons
• Error introduced by model
• Questionable Sampling Weights