Transportation Statistics and Microsimulation

179

10Chapter

Linear Regression

10.1 INTRODUCTION

In previous chapters, we looked at modeling single transportation

phenomena, such as vehicle speed, as a random variable. We illustrated how

to graph empirical speed data, make hypotheses about the distribution of

speeds, and then test the hypotheses using statistical techniques, such as

the Kolmogorov–Smirnov (K–S) test. We also showed how we quantify the

random variable by measures of central tendency (mean, mode, median)

and measures of dispersion (variance and range). Additionally, we demon-

strated how to test hypotheses about these measures by using condence

intervals (CIs), su ...