Explain and give an example for each of the following type of variables. (a) equal-interval, (b) rank-order, (c) nominal, (d) ratio scale, (e) continuous, and (f) discrete. (a) Which statement below is an example of an equal-interval variable? O A. An equal-interval variable is a numeric variable in which all the variables being measured are equal in value. An example of an equal-interval variable is the age of all 30 year old men in a town. O B. An equal-interval variable is a numeric variable in which values correspond to a relative position of things measured. An example of an equal-interval variable is weight. O C. An equal-interval variable is a numeric variable in which differences between values correspond to differences in the underlying thing being measured. An example of an equal-interval variable is the position finished in a marathon by a runner. O D. An equal-interval variable is a numeric variable in which differences between values correspond to differences in the underlying thing being measured. An example of an equal-interval variable is age. (b) Which statement below is an example of a rank-order variable? O A. A rank-order variable is a numeric variable in which values correspond to a relative position of things measured. An example of a rank-order variable is weight. O B. A rank-order variable is a numeric variable in which the measured values are listed in decreasing order. An example of a rank-order variable is the population of each country listed from largest to smallest. O C. A rank-order variable is a variable in which the meaning of the value of zero on the variable indicates a complete absence of the variable. An example of a rank-order variable is the position finished in a race by a runner. O D. A rank-order variable is a numeric variable in which values correspond to a relative position of things measured. An example of a rank-order variable is the position finished in a race by a runner. (c) Which statement below is an example of a nominal variable?(c) Which statement below is an example of a nominal variable? O A. A nominal variable is a variable in which the values are categories. An example of a nominal variable is the gender. O B. A nominal variable is a variable in which the values are positive numbers. An example of a nominal variable is the population of each country listed from largest to smallest. O C. A nominal variable is a variable that is alphabetically ordered. An example of a nominal variable is the attendance list for a high school class. O D. A nominal variable is a variable in which the values are categories. An example of a nominal variable is the height of an individual. (d) Which statement below is an example of a ratio scale variable? O A. A ratio scale variable is an equal-interval variable that has an absolute zero point, meaning that the value of zero on the variable indicates a complete absence of the variable. An example of a ratio scale variable is the number of siblings a person has. O B. A ratio scale variable is a rank-order variable that has an absolute zero point, meaning that the value of zero on the variable indicates a complete absence of the variable. An example of a ratio scale variable is the number of pets a person has. O C. A ratio scale variable is an equal-interval variable that has an absolute zero point, meaning that the value of zero on the variable indicates a complete absence of the variable. An example of a ratio scale variable is temperature in degrees Celsius. O D. A ratio scale variable is an equal-interval variable that has an absolute zero point, meaning that the individual did not participate in the given survey. An example of a ratio scale variable is the number of siblings a person has.(e) Which statement below is an example of a continuous variable? O A. A continuous variable is a variable for which, in theory, there are an infinite number of values between two values. An example of a continuous variable is weight. O B. A continuous variable is a variable that has specific values and that cannot have values between those specific values. An example of a continuous variable is the number of times a person visited their doctor in the last 12 months. O C. A continuous variable is a variable for which, in theory, there are an infinite number of values between two values. An example of a continuous variable number of pets an individual has. O D. A continuous variable is one that is continuously measured over the entire lifetime of an individual. An example of a continuous variable is the number of oranges an individual consumes in their lifetime. (f) Which statement below is an example of a discrete variable? O A. A discrete variable is a variable that has specific values and that cannot have values between those specific values. An example of a discrete variable is the number of times a person visited the dentist in the last 12 months. O B. A discrete variable is a variable that has specific values and can have values between those specific values. An example of a discrete variable is the average amount of times a person visits a dentist every 12 months. O C. A discrete variable is a variable that has specific values and that cannot have values between those specific values. An example of a discrete variable is the height of an individual. O D. A discrete variable is a variable in which each value is ranked in decreasing order, with no two values being the same. An example of a discrete variable is the position finished in a marathon by a runner