PLZ HELP ALOT OF POINTS An independent event is when the outcome of one event does NOT influence the outcome of a second event. Which is NOT an independent event?

flipping coin
rolling dice
picking a card from the deck and returning it
picking a card from the deck and NOT returning it

flipping coin

Step-by-step explanation:

picking a card from a deck and not returning it seems like the right one.

Step-by-step explanation:

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.

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons