Arandom sample of 25 employees of a local company has been taken. a 95% confidence interval estimate for the mean systolic blood pressure for all employees of the company is 123 to 139. which of the following statements is valid?

(a) 95% of the sample of employees has a systolic blood pressure between 123 and 139.
(b) if the sampling procedure were repeated many times, 95% of the resulting confidence intervals would contain the population mean systolic blood pressure.
(c) if the sampling procedure were repeated many times, 95% of the sample means would be between 123 and 139.
(d) 95% of the population of employees has a systolic blood pressure between 123 and 139.