In each of the following statements, identify the number as the value of a population parameter or a sample statistic. Move the number to the appropriate category. (a) A researcher in Boston conducted a study to investigate the prevalence of Alzheimer's disease in people older than the age of 85. The results indicated that 47.2% of the patients studied experienced symptoms consistent with the disease. (b) After an extensive audit, the Metropolitan Transportation Authority reported that 90% of the speedometers on the D line do not work. (c) A consumer magazine tested a random sample of 19 green teas for taste and health benefits. The mean cost per cup of tea was reported to be 14 cents. (d) A computer manufacturer claims that the mean lifetime of laptop batteries is 6.7 hours. (e) A random sample of people visiting the San Diego Zoo was obtained and the mean time spent at the zoo was reported to be 3.54 hours. Parameter Statistic Answer Bank 90% 3.54 hours 47.2% 14 cents 6.7 hours