You are asked to conduct a study on how much time elementary children spend on social media applications like Tik Tok and Snapchat with a focus on socioeconomic brackets.

Established data indicates that there are 20,000 children in all the elementary schools on Guam combined. Your sample size for the study is 300.

15% of the children come from upper-income families.

35% of the children come from middle-income families.

50% of the children come from low-income families.

Utilizing proportionate stratified sampling, how many children in the sample should be:

1. From upper-income families?
2. From middle-income families?
3. From low-income families?

Utilizing disproportionate stratified sampling so that each of the three brackets are equally represented, how many children in the sample should be:

1. From upper-income families?
2. From middle-income families?
3. From low-income families?