12 Jun 2023

Posted on:

08 Jun 2023

0

Resolved:Can someone explain it to me please? sorry, this question is about the previous quiz.

the question is:

which of the following classifies as an experiment but not a trial?

1- flipping a coin 20 times and recording different outcomes

2- flipping a coin 20 times and recording the outcome of the last flap

3-flipping a coin once and recording the outcome

4- flipping a coin 20 times without recording any of the outcomes

I have a good background in summary and inferential statistics

but something is missing it is not clear to me. I can't get the point, 1,2,3 and 4 all are experiments and all have trials and events(outcomes)

Instructor
Posted on:

09 Jun 2023

2

Hey Feras,

Thank you for reaching out!

For this quiz, you would need to follow the definitions of a "trial" and an "experiment" used in the lecture. According to the lecture, "after doing one flip and recording the outcome, we complete a trial. By competing multiple of these trials, we end up conducting an experiment." Therefore:
- "Flipping a coin 20 times and recording the outcome of the last flip" is considered a single trial (the last flip you've recorded)

- "Flipping a coin once and recording the outcome" is again considered a single trial as you've flipped the coin and then recorded the outcome.

- "Flipping a coin 20 times without recording any of the outcomes." is considered neither a trial, nor an experiment, as you don't have a record of any of the flips.

- "Flipping a coin 20 times and recording the 20 different outcomes" - this is considered an experiment as it is comprised of 20 trials.

I hope this clarifies any confusion. I agree with you that the question can be formulated clearer. I remain available if you have any further questions.

Kind regards,

365 Hristina

Posted on:

11 Jun 2023

0

Hey Hristina Hristova

first of all, thank you very much for your detailed answer, it is very clear now,

Except for the part:

"Flipping a coin once and recording the outcome" is again considered a single trial as you've flipped the coin and then recorded the outcome.

Do you mean replicates or repeating trials is a main component of an experiment?

thanks again

Instructor
Posted on:

12 Jun 2023

1

Hey Feras,

Yes, that's correct. A set of trials composes an experiment. Of course, you can say that your experiment consists of a single flip but that would hardly lead to meaningful results :)

Kind regards,

365 Hristina