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StatisticsOverview
Quick Vocab and situations over TWO weeks of learning Statistics
| Question | Answer |
|---|---|
| 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
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