1. Data: collected information
2. Statistics: the science of studying data to make decisions
Data is values from a chart or table
statistics would be deciding what time you leave for school based on a survey
3. Population: ALL the data
4. Sample: a portion of the population
Population of MHS
Sample would be seniors only
5. Census: and entire population (of a city)
6. Parameters: a numerical description of population
7. Statistic: numerical description of sample
Population of 20,000 = parameter (N)
Sample size of 150 = statistic (n)
8. Descriptive Stat: organize, summarize and display
9. Inferential Stat: used to draw conclusions about a population
Descriptive would be a chart or graph
From the graph you conclude ice cream is a favorite dessert for bell 3
10. Qualitative Data: NON numerical (characteristics)
11. Quantitative Data: numerical
Qual = an increase or decrease
Quan = 10 inches
Tuesday, August 28, 2012
Sunday, August 26, 2012
Survival Activity
Over the first two days of stats class, our groups were given a list of 11 items given to us after surviving a plane crash in Canada. We were to rank the items in order of importance, compare our results with the class, then with an actual survivalist, and calculate the statistics to determine the best survivor.
My group would not have survived very well because our rankings were all over the place for each item, they could range anywhere from 1-11 on inportance. For example, the mean for a ball of steel wool was 5.6 for the class, where the expert ranking was 2. The same thing happened with the pistol and map. The items that were ranked nearly the same by the class were the extra clothes, the canvas and the newspaper because everyone knew a use for them.
I personally would not have survived well because my absolute value difference was 4.5. The reasoning for this was because I saw different uses for certain items compared to the class and survivalist. For example, I ranked the lighter 11 because it has no fluid, not thinking it would still spark to start a fire. The survivalist ranked it 1, making my rank of 11 an outlier in my data.
My group would not have survived very well because our rankings were all over the place for each item, they could range anywhere from 1-11 on inportance. For example, the mean for a ball of steel wool was 5.6 for the class, where the expert ranking was 2. The same thing happened with the pistol and map. The items that were ranked nearly the same by the class were the extra clothes, the canvas and the newspaper because everyone knew a use for them.
I personally would not have survived well because my absolute value difference was 4.5. The reasoning for this was because I saw different uses for certain items compared to the class and survivalist. For example, I ranked the lighter 11 because it has no fluid, not thinking it would still spark to start a fire. The survivalist ranked it 1, making my rank of 11 an outlier in my data.
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