A Behavioral Model of Drivers’ Mean Speed Influenced by Weather Conditions, Road Geometry, and Driver Characteristics Using a Driving Simulator Study

Table 1

Required sample size estimation based on age and gender distribution.

Age group	Number of population in the age group	Number of required samples at 90% confidence
Between 21 and 28 years	331951	21
Between 29 and 36 years	238398	15
Between 37 and 44 years	191204	12
Between 45 and 52 years	193180	13
Between 53 and 60 years	81616	6
Overall	1036349	67