Road Rage. The research article Road Rage: Prevalaence Pattern and web based survey Feasibility published by Hinawi Publishing Corporation by Shaily Mina, Rohit Verma, Yatan Pal Singh Balhara, and Shiraz Ul-Hasan. The authors aims to quantitatively evaluate risk factors among motor vehicle drivers using an web based survey. Road rage is defined as “. . . an incident in which an angry or impatient motorist or passenger intentionally injures or kills another motorist, passenger, or pedestrian, or attempts or threatens to injure or kill another motorist, passenger, or pedestrian.” One aspect of the study was to investigate road rage as a function of the experience of drivers in years. The following table provides a frequency distribution of two-thirds of the people who had completed graduation and post-graduation with driving experience of more than 4 years.

Parameter Number of Driving Years Frequency Less than 6 months 6 6 months to 1 year 8 2–3 years 16 4–5 years 32 6–10 years 28 More than 10 years 26 At the 5% significance level, do the data provide sufficient evidence to conclude that road-rage incidents are more likely to occur on some days than on others?