CMN 150V Module 2 actual exam questions and 100% verified correct answers|

empirical methods - correct answers What aspect of the scientific method does "big data" belong to? integrating multiple data sources to produce more complete data source - correct answers What is data fusion? A survey acquires data from a PARTICULAR group of people - correct answers In statistics, sampling is defined as the selection of a subset (a statistical sample) of individuals from within a population to estimate characteristics of the whole population. It was just said that "traditional surveys" are samples. Why? False - correct answers Some 2 out of 7 (almost 30%) of people on Earth are on Facebook. Therefore, Facebook gives a very representative sample of the human population. it is better data than traditional data - correct answers Here we list several characteristics of "big data." Which one is NOT part of our characterization? weather and agricultural data were analyzed to estimate the impact of climate change on food production - correct answers What was done in this case study in Colombia? farmers were able to triple their economic effectiveness - correct answers What was the result of putting this readily available data to work? data is so big that we aim for identifying a representative sample of it - correct answers OK, again: we identified several characteristics of "big data." Which one is NOT part of our characterization? - some people might post sooner after getting up than others - very early risers might not post at all: they are too stressed - late risers might not post at all: they are late already - mainly young people do such a thing: most grandparents won't post "good morning" on Twitter - correct answers What might be a problem when using "Good morning" greetings on Twitter as an estimation when people get up? mobile phone tower triangulation - correct answers How do you think Google obtains this digital footprint? data that describes data - correct answers What is "metadata?" - none of the rows and columns in the original databases had all cells filled completely - different sources were used to complement each other - traditional data (like voter registration) was mixed with - correct answers Several facts make this an example of "data fusion." What are they?