Question: Parameter Versus Statistic In each of the following statements, identify the boldface number as the value of a population parameter or a sample statistic.
a. Some political observers claim that state senators spend too much time addressing colleagues about pending legislation. The mean length for a random sample of speeches was 23.7 minutes.
b. A consulting firm prepared a report from census data and concluded that the proportion of single-family homes in a certain county is 0.52.
c. In a random sample of adults, the mean number of blinks per day was 22,037. d. A ballet instructor found the variance of the number of round-trip miles (to practice) traveled by all students was 150.76.
e. A random sample of people who snowboard at least five times per year found the mean number of injuries per person per year to be 3.4.
f. In a survey conducted by the U.S. Postal Service, 80% of respondents supported the proposed new six-day package, five-day delivery schedule.