Q Math 54 Collected Work Section 1.1 Collected Work Name: Total points: 10 1. (3) Classify the variable as qualitative or quantitative. If it is a quantitative variable, determine whether it is discrete or continuous. a. Grams of carbohydrates in a doughnut b. Phone number c. Internet connection speed in kilobytes per second. 2. (3) Determine the level of measurement of each variable. a. Nation of origin b. Movie ratings of one star through five stars c. Year of birth of college students 3. (4) A study was conducted in which 20,211 18-year old Israeli male military recruits were given an exam to measure IQ. In addition, the recruits were asked to disclosed their smoking status. An individual was considered a smoker if he smoked at least one cigarette per day. The goal of the study was to determine whether adolescents aged 18 and 21 who smoke have a lower IQ than nonsmokers. It was found that the average IQ of the smokers was 94, while the average IQ of the nonsmokers was 101. The researchers concluded that lower IQ individuals are more likely to choose to smoke, not that smoking makes people less intelligent. a. What is the research objective? b. What is the population being studied? What is the sample? c. What are the descriptive statistics? d. What are the conclusions of the study? 1

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