Mean
sum of all the scores divided by the number of scores
The mean is a good measure of central tendency for roughly symmetric distributions
It can be misleading in skewed distributions since it can be greatly influenced by extreme scores.
Variance
The variance is a measure of how spread out a distribution is.
It is computed as the average squared deviation of each number from its mean.
statistics data in Seoul city’s highway traffic management center. We used weather data in the weather center, day of week data in calendar. Our unit of analysis is a car. Using these data, we score traffic jam; calculate average of each independent variable to standardization. In first hypothesis, rainy day’s traffic jam score is higher than sunny day’s traffic jam score. In second hypothe
1) 통계의 정의
통계(statistic)라는 말은 두 가지의 의미를 내포하고 있는데, 그 하나는 수치로 표시된 정보이며, 다른 하나는 그러한 정보를 다루는 방법을 지칭한다. 일반적으로 통계학자들은 전자를 통계자료(statistical data), 후자를 통계방법(statistical method)이라고 구분하고 사용하고 있다. 오늘날 우리
I Introduction
1) Purpose of project
Our purpose of this project is to use the knowledge we learned in the statistics management class and understand how to use these information to analyse the data we collected and depending our data to find the relationship between 3 variables we choose for proving the hypotheses we bring up are correct or not. Statisitics is a very important concept to many
What’s Business Intelligence(BI) ?
Set of applications and technologies of approaching, gathering, storing, analyzing data for quick and correct decision-making.
It includes
{data mining, data base& data warehouse, statistic analytics, prediction etc}
“An umbrella term to describe concepts and methods to improve business decision making by using fact-based support systems."