Thirty students are asked to choose a random number between 0 and 9, inclusive, to create the data set ofn=30digits. If the numbers are truly random, we would expect about 3 zeroes, 3 ones, 3 twos, and so on. If we look exclusively at the number of any digit, for example, 9, we expect the proportion of nines to be 0.1 (since there are 10 possible numbers) and the number of nines to be 3 in the sample of size 30. We can generate the randomization distribution by generating 1000 sets of 30 random digits and recording the number of nines in each simulated sample.

250 221 216 200 191 153 150 Frequency 102 100 50- 40 44 16 2 O 6 8 Nines