Determine whether the underlined number is a statistic or a parameter. A sample of seniors is selected and it is found that 25% own a computer. E) Choose the correct statement below. Parameter because the value is a numerical measurement describing a characteristic of a sample. Statistic because the value is a numerical measurement describing a characteristic of a population. Statistic because the value is a numerical measurement describing a characteristic of a sample. OOOO Parameter because the value is a numerical measurement describing a characteristic of a population. Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Acres of land Choose the correct answer below. O A. The ordinal level of measurement is most appropriate because the data can be ordered, but differences (obtained by subtraction) cannot be found or are meaningless. O B. The nominal level of measurement is most appropriate because the data cannot be ordered. 0 C. The interval level of measurement is most appropriate because the data can be ordered, differences (obtained by subtraction) can be found and are meaningful, and there is no natural starting point. O D. The ratio level of measurement is most appropriate because the data can be ordered, differences can be found and are meaningful, and there is a natural starting zero point. State whether the data described below are discrete or continuous, and explain why. The weights (in ounces) of squirrels in a forest E) Choose the correct answer below. 0 A. The data are discrete because the data can only take on specic values. 0 B. The data are continuous because the data can only take on specic values. 0 C. The data are continuous because the data can take on any value in an interval. 0 D. The data are discrete because the data can take on any value in an interval. Identify the type of sampling used (random, systematic, convenience, stratied, or cluster sampling) in the situation described below. Awoman is selected by a marketing company to participate in a paid focus group. The company says that the woman was selected because every 20,000th person in the phone number listings was being selected. Which type of sampling did the marketing company use? Stratied sampling Cluster sampling Convenience sampling Random sampling OOOOO Systematic sampling Identify which of these types of sampling is used: random, systematic, convenience, stratied, or cluster. To determine her blood pressure, Debra divides up her day into three parts: morning, afternoon, and evening. She then measures her blood pressure at 3 randomly selected times during each part of the day. E) What type of sampling is used? Cluster Systematic Convenience Random Stratied OOOOO Determine whether the study is an experiment or an observational study, and then identify a major problem with the study. A medical researcher tested for a difference in systolic blood pressure levels between male and female students who are 12 years of age. She randomly selected four males and four females for her study. This is an |:| because the researcher : the individuals. What is a major problem with the study? O A. This is a convenience sample with voluntary response, which has a high chance of leading to bias. O B. There is no blinding, which has a high chance of leading to bias. 0 c. The sample includes male and female students. 0 D. The sample is too small. Determine whether the study is an experiment or an observational study, and then identify a major problem with the study. The Physicians' Health Study involved 22,071 male physicians. Based on random selections, 11,037 of them were treated with aspirin and the other 11,034 were given placebos. The study was stopped early because it became clear that aspirin reduced the risk of myocardial infarctions by a substantial amount. This is an S because the researchers : the individuals. What is a major problem with the study? O A. There is no blinding or replication, which has a high chance of leading to bias. 0 B. The results apply only to male physicians. O C. This is a convenience sample with voluntary response, which has a high chance of leading to bias. 0 D. The results apply only to individuals with heart disease. Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Critic ratings of movies on a scale from 0 stars to 6 stars E) Choose the correct answer below. O A. The ratio level of measurement is most appropriate because the data can be ordered, differences (obtained by subtraction) can be found and are meaningful, and there is a natural starting point. Q) B. The interval level of measurement is most appropriate because the data can be ordered, differences (obtained by subtraction) can be found and are meaningful, and there is no natural starting point. 0 C. The nominal level of measurement is most appropriate because the data cannot be ordered. 0 D. The ordinal level of measurement is most appropriate because the data can be ordered, but differences cannot be found or are meaningless. Identify which of these types of sampling is used: random, systematic, convenience, stratied, or cluster. A large company wants to administer a satisfaction survey to its current customers. Using their customer database, the company randomly selects 70 customers and asks them about their level of satisfaction with the company. E) What type of sampling is used? Cluster Systematic Random Convenience Stratied OOOO The sinking ofthe Titanic on April 15, 1912, is one ofthe most infamous disasters in history. A population of 1503 passengers and crew died when the Titanic sank approximately 400 miles south of Newfoundland, Canada. Identify whether the given value is a statistic or a parameter. E) Choose the correct answer below. 0 A. The value is a statistic because it describes some characteristic of a population. 0 B. The value is a statistic because it describes some characteristic of a sample. 0 C. The value is a parameter because it describes some characteristic of a population. 0 D. The value is a parameter because it describes some characteristic of a sample