The diagram represents the truth values of the statements p and q. which statement is true? the truth value of p ∧ q is 20. the truth value of q → p is 26. the truth value of p ↔ q is 46. the truth value of p ∨ q is 6

The truth value of p ↔ q is 46.

Step-by-step explanation:

Option A : The truth value of p ∧ q is 20.

∧ means and

So, we are given that p and q = 20  

Since and denotes intersection  

And we are given that p ∩ q = 20 which is wrong because p ∩ q = 46  

Thus Option A is wrong

Option B : The truth value of q → p is 26.

→ means if p is true then q is true  

Thus means if q is 46 thus p should be 46  

But we are given that q → p is 26.  

Thus it is wrong .

Option C :  The truth value of p ↔ q is 46.

↔ means p is true iff q is true

Since we can see that p = 0+46

q = 46

⇒ p=q=46

⇒ p ↔ q is 46.

Thus Option C is correct .

Option D : The truth value of p ∨ q is 6

 ∨ means or

And or means union

⇒p ∪ q is 6

Which is wrong because p ∪ q = 46

Thus Option C is correct

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.