Posted by **Nancy** on Saturday, April 7, 2012 at 12:06pm.

The amount of time a bank teller spends with each customer has a population

mean of 3.10 minutes and standard deviation of 0.40 minute. If a random sample

of 16 customers is selected,

a) what assumption must be made in order to solve parts (b) and (c)?

b) what is the probability that the average time spent per customer will be at

least 3 minutes?

c) there is an 85% chance that the sample mean will be below how many

minutes?

d) If a random sample of 64 customers is selected, there is an 85% chance that

the sample mean will be below how many minutes?

## Answer this Question

## Related Questions

- Statistic - The amount of time it takes to take your order at the local Whaters ...
- math - A bank wishing to determine the average amount of time a customer must ...
- Statistics - Service times for customers at a post office follow some right-...
- Math - Bank XYZ is hiring, and they would like to determine the number of ...
- Stats - A bank with a branch located in a commercial district of a city has ...
- statistics - historically, the average customer spends $8.53 for all TGP ...
- math - A bank with a branch located in a commercial district of a city has ...
- statistics - A specific study found that the average number of doctor visits per...
- statistics - A cell phone service provider has selected a random sample of 20 of...
- Math (Statistic) - Considered the sampling distribution of a sample mean ...

More Related Questions