unit 5-data

scientifc research conducted in whole or part by distributed individuals, many of whom may not be scientists, who contribute relevant data to research using their own computing devices.

a process that makes data uniform without changing its meaning (changing spelling numbers in letters to their numerical value)

A relationship between two pieces of data typically refers to the amount that one has in relation to the other.

Crowdsourcing: the practice of obtaining input or information from a large number of people via the Internet.

a collection of facts or patterns collected from data

data that does not accurately reflect the full population or phenomenon being studied

choosing a smaller subset of a data set to use for analysis, for example by eliminating / keeping only certain rows in a table

Graph of bars that shows the number of times each value in a column of data appears

: Similar to a bar chart, but all numbers within a range (bucket) are grouped together.

Crosstab Chart: counts the number of times combinations of values appear (similar to a frequency table)

Scatterplot: graph that shows the relationship between 2 sets of data

publicly available data shared by governments, organizations, and others so that anyone can analyze it.

collection of huge amounts of data so we can learn from it often requiring cloud computing or parallel processing systems

data about data that is used to organize, find, and manage information. it is important because it increases the effectiveness of data by providing extra information

The practice of obtaining input or information from a large number of people via the internet.

Histogram advantages- - useful when many unique values must be grouped (ONLY NUMBERS) - easier to read with wider buckets Bar chart advantages - can work with both numeric nad qualitative data - good at finding frequency of a value

histogram -only works with numerical values cons -not useful because they have too many unique values (especially if data has small incremnets and is each input has the same/similar output)

data that uses 2 variables for ex. height and max lifespan of dogs

1 variable ( for ex., the population across states (states is the variable)

Pros/Useful for: Finding the most / least common combinations of values in two columns Finding patterns across two columns Exploring two columns when one or both are strings. Cons/Not useful: If either column has too many values (the chart would be enormous)

scatter plots are useful when you want to see trends and patterns between two values or when you have numerical data with lots of unique, different values. Seeing patterns and trends between two values Numeric data with lots of different values scatter plot are not useful when a specific combination has many values, as this is not easy to visualize. In that situation, using a cross-tab would be more helpful because it counts the frequency of a specific value.