Data
Define Data
Facts and Statistics collected together for reference or analysis.
How are Histograms and pictographs different?
Histograms are like bar graphs, where data is groups by heights.
Pictographs are like ling plots, where pictures are used instead of x's
Why is central data important?
It helps us know what is the average or middle of the data.
Define Probability?
The chance that an event will or will not happen.
Name 3 types of graphs data is organized in?
bar, Circle, Stem and leaf Etc.
How are bar graphs and frequency tables alike?
They both show how many data points are members of a defined category.
How are Box and whisker built?
data is put in order from least to greatest.
divided in half and then each half divided again.
the divisions give me the 4 quartile divisions.
Whiskers go to the largest and smallest data
Name three measures of central tendency
Mean, median, mode
All probability is between what two values?
Zero and one
Describe a normal distribution Graph.
Bell curve
In what form does data need to be in for a circle graph?
Percentage of the whole.
What is interquartile range?
The difference of the upper quartile and lower quartile.
Define Mean, Median, Mode.
Mean = average of data
Median = Middle data point when data in order from least to greatest.
Mode = Data repeated the most often
How are odds different than probability?
Probability is the number of success over the total number of outcomes.
Odds are the number of success outcomes over the failed outcomes.
What is expected value?
the theoretical average result
What is a data cluster?
Data that are grouped around a few points.
What are outliers.
Data outside 1.5 times the interquartile range from other data points.
How is mean computed?
Add up all data point and divide by the number of data points.
What are mutually exclusive events?
p(a or b) = p(a) + p(b)
What discipline in math studies data?
Statistics
Describe two types of Variation.
Natural variation, Variation that happens naturally
Measurement variation, differences in how carefully the data is varied.
Name 3 ways graphs can be manipulated to be misleading?
Truncated Graphs
Inconsistent labeling
Change the scale, axis
Cherry picking data
Why are central measures important?
They give us data to help make decisions about the middle of the data.
What is the name of Ms. Carr's boyfriend?
Theoretical = What should happen mathematically.
Experimental = what actually happens when experiment ran
How are permutations and combinations different?
Permutation = counting repeats in different order
Combination = do not count different orders.