Baruch bookstore is interested in how much, on average, you spend each semester on textbooks. It randomly picks up 1,000 students and calculate their average spending on textbooks. What are the population, sample, parameter, statistic, variable and data in this example? Population: Sample: Parameter: Statistic: Variable: Data: Is this data or variable numerical or categorical? If numerical, is it discrete or continuous? If categorical, is it ordinal or non-ordinal? Please explain your answer.