The phrase "a certain level of confidence" is correct and usable in written English.
It can be used when discussing the degree or amount of confidence someone has in a particular situation or context.
Example: "To succeed in public speaking, one must possess a certain level of confidence to engage the audience effectively."
Alternatives: "a degree of confidence" or "a measure of confidence".
"Asking for help requires a certain level of confidence," Ms. Fox said, "and that's really a milestone of maturation.
Read senses that the return units are developing a certain level of confidence in Joyce, and in themselves.
In turn, to reliably identify sensitive assessors with sufficient test power, a large sample size is needed given a certain level of confidence.
There is a certain level of confidence that at some point the Lakers will get healthy and their problems will be solved.
They need to have a certain level of confidence, belief, being OK with the hours of the star being away and still being able to maintain a certain amount of proximity for the family as a whole.
It takes a certain level of confidence to know when to say yes and when to say no, especially when it comes to sticking with a spending plan when all our friends don't seem to have one.
In order to do well after school, you have to be able to communicate, build relationships and to do those sorts of things you have to have a certain level of self-confidence and self-esteem".
(For more on feeling like you don't measure up, see "No, You're Not an Impostor").. Succeeding in an academic career does require a certain level of self-confidence.
It can be estimated if two sample populations are distinct from each other, to a certain level of statistical confidence, using the T test knowing the sample mean and variance of our test samples, for a specific number of samples.
Scarcella then explained why, in her eyes, queer women tend to identify other queer women by a certain level of self confidence.
To make this work, it does require an engaged development team with a certain level of maturity and confidence, so bear that in mind.
