Answer:
The correct answer to the question is
4. How likely is it that, in a sample of 45, the true mean amount of time needed to find a parking spot is less than 20 minutes?
Step-by-step explanation:
Confidence interval provides a range of likely values for an unknown parameter. The interval is weighted based on probabilities of occurrence, such as 95% or 99% based on the result of a sample of test data.
It gives the probability that a given parameter such as the mean will be of a certain value range based on a given number of times.
As such the confidence level of the given mean amount of time needed to find a parking spot should be known.