The problem with that assessment is the more tests you do the larger your chance of finding something odd.
In isolation you can look at the odds for 17+ and 4-, but two <5, or two > 16 would also look odd. As would a single >20 or <4. And, they started looking at 2 digits but the pattern is only in the last digit so there are looking at 3 groups.
PS: Also how did you calculate the odds? A single number of 17 or more increases the odds of a number of 4 or less. I am not really sure how you would calculate the odds outside of a simulation.
In isolation you can look at the odds for 17+ and 4-, but two <5, or two > 16 would also look odd. As would a single >20 or <4. And, they started looking at 2 digits but the pattern is only in the last digit so there are looking at 3 groups.
PS: Also how did you calculate the odds? A single number of 17 or more increases the odds of a number of 4 or less. I am not really sure how you would calculate the odds outside of a simulation.