An employee of bank wants to test the null hypothesis that on average the bank cashes 10 bad checks per day against the altenative that this figure is too small. If he takes a random sample and decides to reject the null hypothesis if and only if mean of the sample exceeds 12.5, what decision will he make if he gets xbar=11.2 and it will be an erorr if
a) lammda =11.5
b) lammda=10.0
Here lammda is the mean of the poisson population being sampled.