Riddle What causes most auto accidents Each question refers

Riddle: What causes most auto accidents? Each question refers to the percent of cases under the normal curve.

using normal distribution table

1) P(Z>1) = 0.1587 = 15.87%

2) P(Z<2) = 0.9772 = 97.72%

3)p(Z <0.5) = 0.6915 = 69.15%

4) P(Z<-0.6) = 0.2743 = 27.43%

5) p(Z<0) = 0.5 = 50%

6) P(Z<1.96) = 0.975 = 97.5%

7) P(Z<-2.58) = 0.0049 = 0.49%

8)P(Z>-1.75) = 0.9599 = 95.99%

Z-score = x-mean/s

9)
Z-score = 53-49/4 = 1

P(Z<1) = 0.8413 = 84.13%

10)
Z-score = 89-99/5 = -2

P(Z<-2) = 0.0228 = 2.28%

11)

Z-score = 450-500/100 = -0.5

P(Z<-0.5) = 0.3085 = 30.85%

hence the answer to the riddle is

PEOPLE WHO DRIVE IN HIGH SEE THEIR MINDS ARE IN NEUTRAL