# The Naked Scientists Forum

### Author Topic: can you answer the most difficult math question  (Read 2256 times)

#### malylo

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• Posts: 2
##### can you answer the most difficult math question
« on: 09/11/2011 06:41:59 »
Use for Questions 1 and 2 A grocery store takes a random sample of 200 customers. The average check-out time is 4 minutes with a standard deviation of two minutes. 1. The standard error of the mean is? 2. The 95% confidence level for the true average check-out time is? 3. A random sample of 244 observations has a mean of 10, a median of 12 and a mode of 33. The population deviation is known to equal 2.8. the 95.44% confidence interval for the population mean is? 4. The following random sample was collected: 22 33 44 6 The 80% confidence interval for the mean is?
« Last Edit: 09/11/2011 10:30:20 by imatfaal »

#### Nizzle

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##### Re: can you answer the most difficult math question
« Reply #1 on: 09/11/2011 10:28:47 »
I don't think anyone here is willing to do your homework for you :p

If you solve it yourself, you'll remember it better by the time you have your exam :)

#### imatfaal

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##### Re: can you answer the most difficult math question
« Reply #2 on: 09/11/2011 10:29:58 »
Agree with Nizzle - especially as the link (that I removed) made it look as if you might be getting paid for answering this question

#### The Naked Scientists Forum

##### Re: can you answer the most difficult math question
« Reply #2 on: 09/11/2011 10:29:58 »