A general social survey questioned people on their happiness and familyr income. The data are shown in Table 1. Table 1: Frequencies in happiness and income categories Income Not too happy Pretty happy Very happy Total Above average H 159' 1111] 290 Average 53 3?? 2.11 E46 Below average 94 249 83 426 TUI'AL 1&8 F30 414 1362 {a} Is this an example of a randomised experiment or an observaijonal study? Explain your answer. [bi 1liilhat proportion of people with Above average income are 1very happy? [c] What proportion of people who are Not too happy have Below average income? {d} 1Ilv'hat proportion of people have Average income and are Not too happy? Thank you \fA B C D E 1 Research Method | Characteristic 1 Characteristic 2 Strength Limitation 2 Lab Experiment Quasi Experiment Field Experiment 5 Natural Experiment 6 Correlational Study 7 Longitudinal Study 8 Observation 9 Case Study 10 Interview10. The before-and-after experimental design falls under which of the following categories? a. pre-experimental research b. natural Experiments c. quasi-experimental research d. true experimentsThere is no direct intervention from the researcher. Allows for the study of cause and effect where ethically factors could not be manipulated. O Laboratory Experiment O Field Experiment O Correlational Study Natural Experiment Observational Study Secondary Data Analysis Survey Case Study Next Previous