Which of the following is a pen-like instrument that records impulse movement on the ECG paper?

An employee receives an email from an unknown sender claiming to be from the IT department.The email states that there is a login issue on the network and that the user needs to run the file to resolve the problem. The executable file prompts the user to input a network password, which the threat actor records. What social engineering technique is the threat actor using in this scenario?

Choosing entire classrooms rather than individuals for a study is:

Dividing a population by race or grade level before sampling is an example of:

Why can’t incidence be directly calculated in case control studies?

The major disadvantage of case reports and series is:

An example of anthropometric data is:

The main limitation of an ecological study is:

Incident cases in a case control study are defined as:

What is a major cause of selection bias in cohort studies?