Explore BrainMass

# One tail z- test at 5 % level of significance

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

At the local burger Shop, the average wait for burgers and coke is 3.0 minutes with a Ïƒ of .7 minutes. Recently a random sample of 50 customers found that their average wait was 2.75 minutes. At the 0.05 Î±, using a 1 tail test determine if there is any statistical difference and can the proprietor state that his average wait is less than 3 minutes?

If you perform this problem correctly at step 3 you will get a negative value for the Calculated Z. Ignore the negative sign. It is telling you that you sample value is less than you population value numerically and is situated to the left of the mean.

https://brainmass.com/statistics/z-test/tail-ztest-level-significance-45155

#### Solution Preview

Solution is attached in MS word format.

At the local burger Shop, the average wait for burgers and coke is 3.0 minutes with a Ïƒ of .7 minutes. Recently a random sample of 50 customers found that their average ...

#### Solution Summary

The solution provides the response to a one tail z-test at 5% level of significance.

\$2.49