4. It is hypothesized that when homing pigeons are disoriented in a certain manner, they will exhibit no preference for any direction of ight after takeoff

(so that the direction X should be uniformly distributed on the interval from 0 to 360). To test this, 120 pigeons are disoriented, let loose, and the direction of ight of each is recorded; the resulting data follows. Use the chi-squared test at level .10 to see whether the data supports the hypothesis.

Direction 0—45 45—90 90—135

Frequency 12 16 17 Direction 135—180 180—225 225—270

Frequency 15 13 20 Direction 270—315 315—360

Frequency 17 10