Which of the numbers below belong to the set of integers?

I. -4
II. 0.5
III. 3

Question 1 options:

A) III only

B) II and III

C) I and III

D) I, II, and III

The answer to your question is the letter C) 1 and III

Step-by-step explanation:

Integers are numbers without fractional or decimal part.

I. -4 is a negative integer number

II.- 0.5 is a decimal number

III. 3 is a positive integer number

Considering the previous information, the solution is numbers -4 and 3.

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

step-by-step explanation:

the shape,the size and the distance