This document discusses data analysis techniques for analyzing speed, volume, and weather data. It describes how to create boxplots to visualize statistical data based on factors like road surface and visibility. It also discusses using ANOVA analysis of variance to test whether population means are equal, such as comparing vehicle speed under different rainfall and snow conditions or on weekdays versus weekends. The document provides examples of boxplots and ANOVA analyses that could be performed on a traffic data set involving speed, road conditions, and weather variables.

1. Presentation
on
Data analysis

2. speed, volume and weather
TASK 1: Plot BOXPLOT
A Simple Way Of Representing Statistical Data On A Plot In Which A
Rectangle Is Drawn To Represent The Second And Third Quartiles, Usually
With A Vertical Line Inside To Indicate The Median Value. The Lower And
Upper Quartiles Are Shown As Horizontal Lines Either Side Of The
Rectangle.

3.  its simplest form, the boxplot presents five sample statistics - the minimum, the
lower quartile, the median, the upper quartile and the maximum - in a visual display.
 The box of the plot is a rectangle which encloses the middle half of the sample, with
an end at each quartile. The length of the box is thus the interquartile range of the
sample. The other dimension of the box does not represent anything in particular. A
line is drawn across the box at the sample median.
 the box until they reach the sample maximum and minimum.

5. TASK 2: ANOVA Analysis
Analysis of variance (ANOVA) is a collection of statistical models and their associated estimation
procedures (such as the "variation" among and between groups) used to analyze the differences
among means. ANOVA was developed by the statistician ronald fisher. ANOVA is based on the
law of total variance, where the observed variance in a particular variable is partitioned into
components attributable to different sources of variation. In its simplest form, ANOVA provides a
statistical test of whether two or more population means are equal, and therefore generalizes the t-
test beyond two means.

6. TASK 1: Plot BOXPLOT
TASK 2: ANOVA Analysis
Assignment: speed, volume and weather

7. Data set:
Boxplot: Traffic speed Vs Road
surface

8. Boxplot : Avg speed vs surface condition

9. Boxplot: Traffic speed Vs
Visibility

10. Boxplot :Avg speed vs Visibility

11. 2.21 E-31
ANOVA: Vehicle Speed under Rainfall
andSnow

12. 3.74-E05
ANOVA: Vehicle Speed at Weekday
andWeekend
Anova test speed at weekday and weekend

13. THANK YOU!