\"creek 1 Discussion Questions _ 1iWhat is statistics? _ 1iWhat is the difference between descriptive statistics and inferential statistics? _ 1iWhat is the difference between a population and a sample? _ What is a survey? _ 1iWhat is the difference between a sample survey and a census? _ 1iWhat is the difference between a random sample and a representative sample? .'What is the difference between a quantitative variable and a qualitative variable? 8. \"that is the difference between a discrete variable and a continuous variable? 9. What is the difference between crosssectional data and time series data? lU. 1iWhat is the difference between nominal and ordinal data? amen-Jamm IMultiple Choice 1. Under descriptive statistics, we study: a. decision malting tricks c. methods for organizing, displaying, and describing data b. how to collect surveys d. how to describe the probability distribution 2. In statistics, a population consists of all people: a. living in a country c. who answered our telephone survey b. living in the area under study d. or subjects or objects whose characteristics are being studied 3. In statistics, conducting a census means: a. making decisions based on sample results b. checking if a variable is qualitative or quantitative c. collecting information om all members of the population d. deciding if a response is a continuous or discrete variable lo. What type of variable is the number of gallons of gasoline pumped by a lling station during a day? a. Qualitative b. Continuous c. Attribute d. Discrete 1]". What type of variable is the number of robberies reported in your city? a. Qualitative b. Continuous c. Attribute :1. Discrete 13. The Equal Employment Opporbiiuty Act requires employers to classii,r their employees by gender and national origin. Which level of measurement is this\"? a. nominal b. ordinal c. ratio :1. interval 19. What level of measurement are the Centigrade and Fahrenheit temperature scales? a. nominal b. ordinal c. ratio :1. inten'al it}. Which of the following is an example of a continuous variable? a. Time Wm lm c. Number of students in a statistics class b. house number of re sidents d. Rankings of football teams in a league 9. |Cross-section data are data collected: a. on the same element for the same variable for different periods oftirne b. on differentelements for the same period of time c. for a qualitative variable d. on different elements fbr different periods ot'time 1i}. Under inferential statistics we study: a. decision making about populations based on sample results b. how to make decisions about mean. median. or mode c. how a sample is taken from a population of. collection methods to obtain a census 1 1. In statistics. conducting a survey means: a. collecting information from elements c. drawing graphs and pictures b. making mathematical calculations d. collection methods to obtain a census 12. In statistics. a representative sample is the sample that: a. contains the characteristics ofthe population as closely as possible b. represents the results of a sample exactly c. contains all people living in an area d. represents the responses ofa11 WM 13. The incomes of a group of 513 loan applicants are obtained. Which level of measurement is income? a. nominal b. ordinal c. ratio d. interval 14. The members of each basketball team wear numbers on the back of their jerseys. What scale of measurement are these numbers considered? a. nominal b. ordinal c. ratio d. interval 15. Shoe sizes1 such as EB, 10D and 12E. are examples ofwhat level of measurement? a. nominal b. ordinal c. ratio d. interval 4. A random sample is a sample drawn in such a way that: a. each member of the population has some chance for being included in the sample b. includes all elements of a population c. some members of the population have no chance of being included in the sample d. each member of the population has .lllI chance for being included in the sample 5. A data set is a: a. set of decisions made about the population c. collection of observations on a variable b. set of graphs and pictures d. none of these I5. An observation is the: a. graph observed for a data set c. table prepared for a data set b. value of a variable for a single element d. sample observed from the population T. A discrete variable is a variable that can assume: a. categorical values only c. uncountable values b. countable values only d. nonnumerical values 3. A qualitative variable is the one that: a. can assume numerical values c. can assume uncountable values b. cannot be graphed d. cannot be measured numerically