Friday

October 31, 2014

October 31, 2014

Posted by **Jake** on Saturday, October 22, 2011 at 6:21pm.

Suppose cars arrive at Burger King's drive-through at the rate of 20 cars every hour between 12:00 noon and 1:00 pm. A random sample of 40 one-hour periods between 12:00 noon and 1:00 pm is selected and has 22.1 as the sample mean number of cars arriving. (a) Why is the sampling distribution of the sample mean approximately normal? (b) Assuming and , what is the mean and standard deviation of the sampling distribution? What is the probability that a simple random sample of size n = 40 one-hour time periods results in a mean of at least 22.1 cars? Is this result unusual?

**Answer this Question**

**Related Questions**

College Algebra - I have tried and struggled I really need osme help. I have an ...

Dear Jiskha - Dear Jiskha, I really need help with some things and I am able to ...

Statistics - I'm looking for some help with my statistics homework...I'm good ...

statistics - I am having trouble generating a data set with 30 values for a ...

Probability-Math - Please forgive me for posting this for the 3rd time but I ...

statistics - Please help!! I have been researching this online for hours with no...

HELP PLEASE - I'm really, really, really, sorry but I seriously need help. I can...

Math - How do you convert a number to whatever base it indicates? For example: ...

R.E - Please help, sorry if i keep re-posting but i have loads of R.E questions ...

To: Ms. Sue - Ms. Sue I need statistics on Sav. Syn. I tried looking on the ...