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0/2 polnts 1 Previous Answers PODStat5 4.E.9 Notes O Ask Your Teache In a study investigating the effect of car speed on accident severity, 5000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5000 accidents, the average speed was 42 mph and that the standard deviation was 12 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal (a) Roughly what proportion of vehicle speeds were between 30 and s4 mph? (Round the answer to the nearest whole number) Approximately (b) Roughly what proportion of vehicle speeds exceeded 54 mph? (Round the answer to the nearest whole number) Need Help? L Telh to Tter ubmt Answer Save Progress Practice Another Version

Answer 1

Soluti oL 12- 6 2 2 Usingtandand narmal table 0 8413-0IS89 6.6826 to tle hearest whale sing standard hornal table -6.8413 to the whole hunber