Relative Risk of Lung Cancer

The National Institute of Health funded a research project to address a critical public health concern about lung cancer risk and the intervention of smoking cessation. The study aimed to investigate lung cancer’s relative risk (RR) and its potential variation between the intervention of smoking cessation and control groups over time. The goal was to understand the impact of interventions of smoking cessation on the risk of lung cancer, which is crucial for informed decision-making and improved health outcomes.

The project used a comprehensive survey dataset, which formed the foundation of the research. The dataset comprised survey responses from 12,000 patients collected over six years, allowing for a longitudinal examination of the RR of lung cancer among both intervention and control groups.

The hypothesis postulated a significant difference in the RR of lung cancer between the intervention of smoking cessation and control groups over time. The analysis utilized a mixed Analysis of Variance (ANOVA), a robust statistical method for examining the effects of both between-subjects factors (intervention vs. control group) and within-subjects factors (changes over time) on a continuous outcome variable (RR of lung cancer). 

The analysis yielded compelling findings […]

By |2024-01-24T15:07:21+00:00January 15th, 2024|Academia, Biostatistics, Hospital|Comments Off on Relative Risk of Lung Cancer

Internet Use

The National Science Foundation funded a project to explore the effect of internet use on perceived performance. With the increasing integration of technology into education and daily life, the client sought to investigate whether the extent of internet use had a discernible effect on how individuals perceived their performance.

To comprehensively address this research question, a project team was granted access to a substantial dataset consisting of survey responses from a diverse group of 8,000 students. This comprehensive study spanned three years, enabling a longitudinal examination of the relationship between internet use and perceived performance.

The dataset was primarily composed of survey data, which provided valuable insights into students’ internet usage patterns and their self-assessment of performance. This dataset served as the foundation for analysis, enabling researchers to delve into the potential effects of internet usage on individuals’ perceived performance levels.

The hypothesis was as follows: H1 – There is a significant effect of internet use on perceived performance. The objective was to rigorously test the hypothesis to determine whether internet use statistically affected individuals’ perceptions of their performance.

We conducted linear regression using the statistical software SPSS to address the research question and evaluate […]

By |2024-01-24T15:08:42+00:00January 15th, 2024|Academia, Statistics|Comments Off on Internet Use

Mathematics Performance

We were involved in a research project commissioned by the National Science Foundation. The project’s objective was to explore the effect of motivation on students’ mathematics performance. The client, committed to advancing education and understanding the factors that influence academic achievement, wanted to investigate the role of motivation in mathematics performance using data from the Third International Mathematics and Science Study (TIMSS) conducted in 1999.

The project leveraged data from the TIMSS 1999 study, which included a diverse sample of 500,000 students from various participating countries. This dataset encompassed a wide range of grade levels, making it one of the most significant international assessments of student achievement in mathematics.

The hypotheses were as follows:
H1 – Intrinsic motivation positively influences mathematics performance, while external regulation impacts it negatively.
H2 – A positive mathematics self-concept significantly affects mathematics performance.
H3 – A positive mathematics self-concept significantly affects intrinsic motivation, affecting mathematics performance.
H4 – Autonomy support in the classroom significantly affects mathematics performance.
H5 – Autonomy support in the classroom significantly affects mathematics self-concept, affecting mathematics performance.

We adopted a comprehensive data analysis approach to evaluate the hypothesis. We performed Structural Equation Modeling (SEM) and Multilevel Path Modeling analyses using […]

By |2024-01-24T21:10:54+00:00January 10th, 2024|Academia, Statistics|Comments Off on Mathematics Performance

Political Parties

This research project, funded by the National Science Foundation, aimed to investigate whether there were discernible differences in political party affiliation based on age. The client recognized the significance of understanding the difference in political party preferences based on age and thus initiated this study using a comprehensive dataset of survey responses from 12,000 participants over five years.

We conducted a chi-square test using SAS, a statistical software, to thoroughly evaluate the hypothesis that there were significant political party differences by age. This chi-square test proved an effective statistical tool for assessing the association between categorical variables. This chi-square test is most appropriate for investigating differences in political party preferences across various age groups.

The analysis revealed that there was indeed a statistically significant difference in political party affiliations based on age, indicating that age played an important role in shaping individuals’ political preferences and party affiliations. The client was able to derive valuable insights from this research project, which could inform political campaigns, outreach strategies, and policy initiatives tailored to specific age groups.

This National Science Foundation-funded project provided essential insights into the interplay between age and political party affiliations. By rigorously testing […]

By |2024-01-24T20:45:28+00:00January 9th, 2024|Academia, Statistics|Comments Off on Political Parties
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