MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In a city of 50,000 households, 200 were randomly sampled and the heating bill for January was recorded. The standard deviation of these 100 values was then computed. The standard deviation is a: 1) A) parameter B) interquartile range C) range D) statistic 2) A scientist is testing the hardness of a new type of ceramic and controls the contents of the mixture as well as the oven temperature. This is an example of: 2) A) a longitudinal study B) an experimental study C) an observational study D) a cross-sectional study 3) A scientific team collects water samples from a fresh-water lake to measure levels of a certain pollutant. For the team, this constitutes: 3) A) tertiary data B) primary data C) population data D) secondary data 4) You have a population of 500 numbers from which you wish to randomly sample 50 of them. The best approach is: 4) A) sort the data from lowest to highest and pick the first 50 B) add the digits in each number, sort by the sum and pick the first 50 C) put the data in a spreadsheet column, generate random numbers in the next column, sort by the random numbers and pick the first 50 D) sort by the number of threes in each number and pick the first 50 5) A polling firm conducts a survey for a political party to determine the level of support for the party's policies. If a third party then observes the poll results, for this third party this constitutes: 5) A) population data B) tertiary data C) secondary data D) primary data 6) A survey has a convoluted question in which the respondent might answer incorrectly in spite of not clearly understanding the question. This is an example of: 6) A) coverage error B) sampling error C) processing error D) response error 7) A secretary does data entry for a surve