This is in Statistics. Explain comprehensively. Avoid plagiarism. thank you and Godbless.

1. Define variable, and explain the difference between a quantitative variable and a qualitative (categorical) variable. 2. Discuss the difference between cross-sectional data and time series data. Give one example for cross-sectional data in tabular form and one example for time series data presented using time series plot. Utilize available the data coming from your own work environment. 3. Consider a medical study that is being performed to test the effect of smoking on lung cancer. Two groups of subjects are identified; one group has lung cancer and the one doesn't have. Both are asked to fill out a questionnaire containing questions about their age, sex, occupation, and number of cigarettes smoked per day. What is the response variable? Which are the factors? What type of study is this (experimental or observational)? Explain. 4. Explain (a) population, (b) census and sample, (c) descriptive statistics, (d) statistical inference, (e) process, (f) ratio variable and interval variable, and (g) ordinal variable and nominative (nominal) variable. 5. Give 3 examples for each scale of measurement: nominative (nominal), ordinal, interval, and ratio