Explain the difference between an interval estimator and a point estimator for mu. choose the correct answer below. a. a single number calculated from the sample that estimates a target population parameter is called an interval estimator. a point estimator is a range of numbers that contain the target parameter with a high degree of confidence. b. a single number calculated from a population that estimates a target sample parameter is called a point estimator. an interval estimator is a range of numbers that contain the target parameter with a high degree of confidence. c. a single number calculated from the population that estimates a data value of the sample is called a point estimator. an interval estimator is a set of numbers estimating the range of a data set with a high degree of confidence. d. a single number calculated from the sample that estimates a target population parameter is called a point estimator. an interval estimator is a range of numbers that contain the target parameter with a high degree of confidence.