A historian desires to determine the average age at marriage for women in New England in early 19th century. In her state archives she finds marriage records for the years 1800-1820. She takes the simple random sample of 1200 records and determines the average age is 24.1 years. She also records the county of residence for each woman. She then estimates that the average age of brides for the population was between 23.5 and 24.7 years.
(a) What is the population in this study?
(b) What is the sampling frame for the study?
(c) What is the sample in this study?
(d) What is the qualitative variable in this study?
(e) Is 24.1 years a statistic or a parameter?
(f) Which part of the study is inferential?