Gianluca is a farmer. He has 480 cows. Gianluca wants to take a random sample of 20 cows. Describe a method that Gianluca could use ........................................................................................................................ ...................................................................................................................................................................................................................................................

One effective method Gianluca could use is to assign a unique number to each of his 480 cows from 1 to 480. Then, using a random number generator or drawing numbers from a hat, he can select 20 distinct numbers. The cows corresponding to those numbers will form his random sample. This approach ensures that every cow has an equal chance of being included in the sample. To avoid any bias in his selection, Gianluca should ensure that the random number generator is truly random. This means he should avoid using any patterns or sequences when generating the numbers. Additionally, he should double-check that no number is picked more than once, as repetition would skew his sample size and results.