Question

How do I find the level of confidence when not given one?

Answer 1

If level of confidence is mot given, first we check if level of significance   is given or not.

If the value of is given in the problem then the level of confidence = %

If the value of is not given in the problem , we can choose a random value of

Generally in statistics problem we take or  

For the level of confidence = % = % = 95%

For the level of confidence =% = % = 99%