3.16 The data below represent departure of actual daily temperature in degrees Fahrenheit from the normal daily temperature at noon at a certain airport on 7 consecutive days.

Day 1 2 3 4 5 6 7 Departure 12 13 12 11 5 1 2

(a) Give an appropriate P value that reflects whether the pattern of positive and negative departures can be considered a random process against the alternative of a tendency to cluster.

(b) Give an appropriate P value that reflects whether the pattern of successive departures (from one day to the next) can be considered a random process against the alternative of a trend.