Final answer:
The confidence level for a 90% confidence interval represents the percentage of confidence intervals that would contain the true value of the population parameter.
Step-by-step explanation:
In order to find the confidence level for a 90% confidence interval, we need to understand that the confidence level represents the percentage of confidence intervals that would contain the true value of the population parameter. In this case, the confidence level is 90%. This means that if we were to construct multiple confidence intervals using the same method, we can expect that approximately 90% of those intervals would contain the true value of the population parameter we are estimating.