3 articles trouvés pour ce sujet.
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A hypothesis test |
2007-04-09 |
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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. |
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A standard deviation test |
2004-11-09 |
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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. |
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The p-value |
2004-07-25 |
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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 p-value?
Having problems finding the p-value & unsure of the formula.
Kathy
Penny Nom lui répond. |
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