Which statement correctly defines a confidence interval?

• a.)
• A confidence interval indicates a range of values by giving just a margin of error.
• b.)
• A confidence interval dictates the level of significance for a given set of data.
• c.)
• A confidence interval is equal to the sample mean divided by the margin of error.
• d.)
• A confidence interval indicates the probability that a population mean will fall within a given range of values.