A scientist conduncted one trial of experiment and got unexpected results. How can the scientiest increase confidence in the results?

by repeating the experiment several times

Explanation:

A scientist conducted one trial of an experiment and got unexpected results. Therefore, he should repeat his experiment and see if he is getting the same result again or not. If the result is again the same and does not matches his expectations then he should discuss the results with other scientist. If the result is different, then he should check for the cause of error.