head first data analysis
2017-01-03 16:20:57 0 举报AI智能生成
Head First Data Analysis
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8. How to
persuade city council to believe LitterGitters do their work well?
persuade city council to believe LitterGitters do their work well?
ask the right question,make the answer yes or no
calculate the frequency of the yes or no answers
defeat stereotypes by reveal the wrong links
9. Is it wise to ask for a raise in work?If so,how much would be reasonable?
get data from PR
use R to make histogrem to show whether ask or not will make difference
子主题
10. use last chapter's data to start a consulting business about telling people how much to ask of a raise
y=b+ax
have some problems
11. Why are there inaccurate of prediction?
chance error
catalog the data vary different range of precision
use different equation to prediction differrnt data
子主题
12. Local magazine want to know their sales have anything to do with the issues or the writers
many spreadsheets have relationship
use the relationship to reveal the link
SQL
13. How to get the data exactly the way client want?
compare the original data to the final result that client needed
"clean it" by using execl or R
regular expressions,remove duplication
1. Cosmetic company wants to increase sales
Define
Disassmble
Evaluate
Decide
2. Coffee stores want to increase coffee sales
put confounds aside
子主题
3. Bath tools factory wants to know how much ducks&fish to make so they can get max profit
optimizi solution
mutiple equations to limit the region
use Execl Solvor
4. Web site of clothes sale want to know which layout is best
use R to show the data
9 grids
5. A phone skin company need to know when the Phone will release so they can make the skin at perfect time
show all the known things
list all the predictions
make a table,use + or - to evaluate the con
6. when you diagnosed a Lazard flu,is it ture or false?
Bayes' rule
7. An international company has many analysts,how to measure their predictions?
use percentage to numericail the probblity
new information come up
Bayes' rule
will Russin sell it's oil business?
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