Question

In a sample of 500 nurses, half were randomly given a placebo and halfwere randomly given a new drug for migraines.Observational study or randomized experiment (circle one)?Explain:

Answer 1

Given:

Total nurses = 500

Half were randomly given a placebo and half were randomly given a new drug

Find-:

Observational study or randomized experiment

Explanation-:

If half randomly placebo

That means 250 nurses with placebo and 250 nurses with new drug

So,

It is an observational study