What is an inherent zero? Describe three examples of data sets that have inherent zeros and three that do not. Choose the correct answer below. A. An inherent zero is a value that the variable can take. B. An inherent zero is a zero that implies none. C. An inherent zero is a zero that occurs in the data set naturally. Select three examples of data sets that have inherent zeros below. A. Maximum wind speed during a hurricane B. Average monthly percipitation in inches C. Average age of college students in years D. Average IQ score of a high school class E. A student's level of happiness measured from 0 to 10 F. Temperature in degrees Fahrenheit Select three examples of data sets that do not have inherent zeros below. A Maximum wind speed during a hurricane B. Temperature in degrees Fahrenheit C. A student's level of happiness measured from 0 to 10 D. Average age of college students in years E. Average monthly percipitation in inches F. Average IQ score of a high school class Use the value of the linear correlation coefficient to calculate the coefficient of determination. What does this tell you about the explained variation of the data about the regression line? About the unexplained variation? r = 0.702 a.) Calculate the coefficient of determination. ________ (Round to three decimal places as needed.) b.) What does this tell you about the explained variation of the data about the regression line? _________ % of the variation can be explained by the regression line. (Round to one decimal place as needed.) c.) About the unexplained variation? _________ % of the variation is unexplained and is due to other factors or to sampling error. (Round to one decimal place as needed.) Identify the sampling techniques used, and discuss potential sources of bias (if any). Explain. Using random digit dialing, researchers call 900 people and ask what obstacles keep them from sleeping 8 hours a night . What type of sampling is used? A. Convenience sampling is used, since the 900 phone numbers that are easiest to reach are selected. B. Simple random sampling is used, since each number has an equal chance of being dialed, so all samples of 900 phone numbers have an equal chance of being selected. C. Systematic sampling is used, since phone numbers are selected from a list using a fixed interval between phone numbers. D. Cluster sampling is used, since the phone numbers are divided into groups, several groups are selected, and each number in those groups is called. What potential sources of bias are present, if any? Select all that apply. A. Individuals may not be available when the researchers are calling. Those individuals that are available may not be representative of the population. B. Telephone sampling only includes people who have telephones. People who own telephones may be older or wealthier on average, and may not be representative of the entire population. C. The sample only consists of members of the population that are easy to get. These members may not be representative of the population. D. Individuals may refuse to participate in the sample. This may make the sample less representative of the population. E. There are no potential sources of bias