2.5 A manager at the Norinchukin Bank, a Japanese cooperative bank, randomly sampled 12 overdrawn bank accounts.

The following overdrafts are found (in 000 yen):

1.2 3.15 2.33 4.15 3.1 2.74 3.1 2.63 1.8 1.5 4.18 5.23

a. Compute the sample median.

b. Compute the sample mean.