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