Category Archives: Data mining and analytics

Analysis of United States Olympic Medal

Author: Mitchel BergEric Fleming, Samuel Studinger, and Alec Tostenrud

1. Introduction

After the relatively poor performance of U.S. in the 2018 Winter Olympics in PyeongChang, South Korea, we found it a unique opportunity to look at the placement of U.S. in the Olympics over the years to determine if the country’s success has really been changing. To explore this opportunity, we used an Olympic reference dataset (https://www.sports-reference.com/olympics/) that contained information on every athlete’s Olympic results including events participated in, medal placing, country represented, and place of birth.

2. Objective

The objectives of our analysis were:

  1. Determine whether the United States’ Olympic dominance has been declining in recent history
  2. Create a visual way to see a country’s success in the Olympic Games
  3. Explore results from an internal perspective within the United States

3. 

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Stationary time series and its properties

Author: Xiaochen Xian

In this article, I would like to introduce stationary time series and its properties. Stationary time series is one whose properties do not depend on the time at which the series is observed. It has been widely applied and shows strong power in statistical analysis. The time series with any trends, seasonal patterns, or both, are not stationary. These types of time series, however, can often be converted to stationary time series using techniques like de-trending or differencing.

1. What is time series?

Time series, as its name says, is a sequence labeled by time. We denote the time series variable as ${Y_t: t=\cdots, -1, 0, 1 \cdots}$.… Read more

Bird Strikes

Author: Ting Lei 

1. Introduction

The event of an airborne animal hitting an airplane in flight is referred as bird strike. Although bird strikes are a lesser hazard to aviation than some other well-known hazards such as air turbulence and icing, it still poses a sizable threat to airline safety and do present risk that needs to be addressed. According to Bird Strike Committee USA, wildlife strikes cause over $650 million annually in damage to U.S. civil and military aviation.

The goal of this article is to discuss some of the characteristics of bird strikes, raise the awareness of this issue, and help reduce the likelihood of bird strikes.… Read more

Investigation of Obesity in the United States

Author: Ting Lei

1. Introduction

Obesity is one of the biggest health problems across the United States. According to the data from the National Health and Nutrition Examination Survey:

  • More than 1 in 3 adults are considered to be obese.
  • More than 1 in 20 adults are considered to have extreme obesity.
  • More than 1 in 6 teenagers age from 6 to 19 are considered to be obese.

Obesity is usually accompanied with various other diseases, which combined kill millions of people per year. These diseases include type 2 diabetes, heart disease, high blood pressure, nonalcoholic fatty liver disease, osteoarthritis, cancer, stroke and various others.… Read more

NBA Home Court Advantage Analysis

Author: Ting Lei 

1. Introduction

Every sports fan knows that their favorite teams have more chance to win on the home court; and for professional athletes, they will surely make every effort to secure home-court victories in the regular season. The goal of this article is to 1) determine which teams in the NBA have the best home-court advantage; 2) provide some insights into how does the number of rest days of home and away teams impact the home-court advantage; as well as 3) determine what are some other possible factors to home-court advantage from 2011-2012 through 2015-2016 seasons.

Why do we choose NBA among the four major American pro sports?… Read more