Can you help with the following premises of STATISTICS? Please, choose the correct answer:

1) In a survey of 500 randomly selected adults, 35% answered "yes" when asked "Do you have a gun in your home?"

a) sample: all adults surveyed population: all 500 randomly selected adults.

b) sample: the 500 selected adults population: all adults.

2) Suppose a researcher decides to conduct a study on how many cases of COVID-19 there were in Cuba in a given month. To do the above, you will have to consult data and frequencies of the number of people who contracted this disease throughout that period. Once all the data has been obtained, they will be in charge of structuring and classifying the information to represent it through a graph or table. What kind of statistic is the researcher using?

Response option group:

a) inferential statistics

b) descriptive statistics

3) Suppose we have a sample of 5,000 subjects and we want to obtain a sample of 100 of them. We first divided the sample into 100 fragments of 50 subjects. Then, we select a random number between 1 and 50, to extract the first random individual from the first fragment: for example, 24. From this individual, the sample is defined by extracting the individuals from the list with 50-unit intervals, as follows: 24, 74, 124, 174, ..., 4.974. What type of sampling was used?

Response option group

a) systematic

b) by conglomerates

c) stratified

d) for convenience

4) Suppose we have a sample of 5,000 subjects and we want to obtain a sample of 100 of them. We first divided the sample into 100 fragments of 50 subjects. Then, we select a random number between 1 and 50, to extract the first random individual from the first fragment: for example, 24. From this individual, the sample is defined by extracting the individuals from the list with 50-unit intervals, as follows: 24, 74, 124, 174, ..., 4.974. What type of sampling was used?

Response option group

a) systematic

b) by conglomerates

c) stratified

d) for convenience

5) An ophthalmologist from the Puerto Rico Ophthalmology Center wants to carry out an optical study to see if young people improve their eyesight after certain visual exercises. He decides to study the students of a course that he offers at the UPR, Ro Piedras Campus. What type of sampling will be used?

Response option group

a) by clusters

b) for convenience

c) stratified

d) systematic