Justin designed an experiment to find out how running up bleachers affects his heart rate. First he records his resting heart
rate and then runs up the bleachers 10 times. Each time he reaches the top, he records his heartrate then rests 20
minutes.
Which is involved in Justin's experiment?
O
O
O
O
replication
repetition
both repetition and replication
neither repetition nor replication

Explanation:

Repetition is the term used to indicate that several sets of tests or trials are performed as part of the same experiment. This is done to reduce the effect of the random errors of the measurements taken on the results, by taking an average.

Replication is a term used to refer to the fact that the entire investigation is performed by other researcher to determine if the results of the first investigation can be reproduced.

Repetition is aimed to improve the quality of the results of an experiment, while replication is aimed to prove the validity of the results previously reported for an investigation.

12 is it do you think so