Exercise1:
When a red flower was crossed with a white flower, the offspring flower color ratio of red : pink : white flowers was 1 : 15 : 4, which was expected to be 1 : 2 : 1. Examine whether it is abnormal.
Exercise2:
Six surfaces of a die have equal probability to be its upper surface when it comes to rest after being rolled. When the die was rolled 60 times, each surface numbered from 1 to 6 became the upper surface at frequencies of 18：6：9：10：7：9 times, respectively. Analyze whether their frequencies are random or non-random events.
