







A hypothesis test 
20070409 

Katrina pose la question : I have already tried to do this problem but im having a very had time with
it. Can you please help me.
Glamour Magazine sponsored a survey of 2500 prospective brides and
found that 60% of them spent less than $750 on their wedding gown.
Use a 0.01 significance level to test the claim that less than 62% of brides
spend less than $750 on their wedding gown. How are the results
affected if it is learned that the responses were obtained from magazine
readers who decided to respond to the survey through an Internet Web
site? Penny Nom lui répond. 





A standard deviation test 
20041109 

Karen pose la question : How do you compare to see if a sample standard deviation is different than the population standard deviation? I know how to compare means, but not standard deviations. Penny Nom lui répond. 





The pvalue 
20040725 

Kathy pose la question : Ms. Lisa Monnin is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information.
At the .10 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? What is the pvalue?
Having problems finding the pvalue & unsure of the formula.
Kathy Penny Nom lui répond. 

