CFU on Sept 6 Flashcards
(16 cards)
What is analysis
The carful study of data in an attempt to find patterns and meaning in the data and evaluate the reliability of data
What is the analysis of experimental data
helps scientists make evidence based conclusion about cause and effect
what is the analysis of observational data
helps scientists make evidence based conclusions about correlation
How do scientists analyze data?
scientists often use digital spreadsheets to organize data, generate graphs, and perform statistical calculations
What are the common types of graphs?
Line
Bar
Pie
Histogram
Scatter plot
What should the title of a graph include?
The purpose of the graph
the names of the variables being recorded
the source of the data
the time/date when the data was collected
What should the labels on the X-axis and Y-axis include?
The name of the variable being recorded along the axis
the units of measurement (as applicable)
which variable is on the x-axis
independent
which variable goes on the Y-axis
dependent
What are gridlines?
the extra vertical and horizontal lines between the main axes that help locate with greater precision the value of the data points
what is a scatter plot graph?
a graph where data points are plotted to show the relationship (correlation) between 2 variables
what is the line of best fit?
a calculated (statistical) line pn a scatter plot graph that best represents the overall trend in the data
the line may touch some of the data points, none of the data points, or all of the data points
the line can be straight or a smooth curve
what is the r^2 value?
a calculated (Statistical) number between 0-1 that describes how “tight” your data is to the line of best fit. Generally, the higher the r^2 value, the tighter your data is to the line of best fit and the stronger the correlation between the two variables
why is the line of best fit useful?
you can use the line of best fit to the qualitative value of variables you haven’t directly measured
what does interpolating mean?
predicting how 2 variables correlate based on a known data point that falls within the range of previously measured data
what does extrapolating mean?
predicting how 2 variable correlate based on a known data point that falls outside the range of previously measured data
