Question: The ages (in years) of 20 randomly sampled dogs are shown in the table below.

4 2 7 1 0.5

3 11 6 8 3

1 4.5 5 3 9

10 8 2 0.5 4

Using excel construct a 80% confidence interval using a t- distribution for the mean age.

80% confidence interval= ___________ +/-________________ Round your answers to two decimal places.