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StatisticsOverview

Quick Vocab and situations over TWO weeks of learning Statistics

QuestionAnswer
Population The entire collection of people or objects being studied.
Sample a group of people or objects selected FROM the POPULATION
Representative Sample a sample that is ACCURATE *Good
Biased Sample a sample that doesn't represent an important sub-population *Bad
One interval includes how many numbers? two ex: 35 - 40
To properly label a graph what is needed? Title, horizontal and vertical labels
Give the interval: The intervals go by 2's... 10 10-12
Give the interval: The intervals go by 10's... 27 20-30
Give the interval: The intervals go by 100's... 89 0-100
If you made a Histogram and realized your data goes off the graph, what do you do? Raise the vertical axis
Minimum (Min) Smallest number in data
Maximum (Max) Highest number in data
Range G - L = R
Outliers Random piece of data (unusually high or low)
Mean Average
Median Middle
How do you find the MEAN? Add up all numbers and divide them by however ,many there are
How do you find the MEDIAN? Line up data numbers least - greatest. Then mark them off left to right till you find the middle.
Name the parts of a 5 word summary Minimum Maximum Lower Quartile Upper Quartile Median
Lower Quartile Like a median but on the left side of it
Upper Quartile Like a median but on the right side of it
How do you construct a BOX PLOT? 5 word summary
What % of the data values are before the median on a BOX & WHISKER PLOT? 25% + 25% = 50%
What % of the data values are before the upper quartile on a BOX & WHISKER PLOT? 25% + 25% + 25% = 75%
What % of the data values are after the upper quartile on a BOX & WHISKER PLOT? 25%
Does building a BOX & WHISKER PLOT involve using the 5 word summary? YES
When looking at a BOX & WHISKER PLOT would you rather have data with/without outliers? WITH - B/C the data is more specific. Otherwise it makes data look inaccurate.
When creating SCATTER PLOTS are labels needed on the dots? NO
On SCATTER PLOTS are Titles and Labels on both AXES needed? YES, on ALL graphs are they needed.
What is the word for an INCREASE or DECREASE on a SCATTER PLOT? Correlation
Increase on a SCATTER PLOT is represented by: ... Positive ( + )
Decrease on a SCATTER PLOT is represented by: ... Negative ( - )
Trend Line A line that FITS the pattern of data on the graph
Where should the TREND LINE be found on a SCATTER PLOT? In the MIDDLE of the dots
Name the 4 options for a Sampling Plan Convenience - Systematic - Voluntary Response - Random
Convenience Easy
Systematic Patterned
Voluntary Response Questioned chance of participation
Random Equally likely, and variety
Created by: Zacfan0501