Remember that we use the 95% confidence interval ( ) to determine whether two values agree. So in this case, if the change in momentum is zero (that is, if zero falls within of ), then we would say that the data agree with momentum being conserved. If the change in energy is zero, then we would say that the data agree with energy being conserved.
a) 95%
b) 5%
c) 99%
d) 1%