Question

You are the manager of a restaurant for a fast-food franchise. Last month, the mean waiting time at the drive- through window for branches in your geographical region, as measured from the time a customer places an order until the time the customer receives the order, was 3.7 minutes. You select a random sample of 64 orders. The sample mean waiting time is 3.57 minutes, with a sample standard deviation of 0.8 minute.

1- At a 95% confidence level, is there evidence that the population mean waiting time is different from 3.7 minutes?

2- Because the sample size is 64, do you need to be concerned about the shape of the population distribution when conducting the t- test in (a)? Explain.

Answer #1

(2) A one sample t-test assumes that the underlying distribution is
approximately a normal distribution. Here, since the sample size is
64, then according to the central limit theorem, the distribution
of sample means is approximately normal. Hence, we do not need to
be concerned about the shape of the population distribution because
it is assumed to approximately follow a normal distribution.

You are the manager of a restaurant for a fast-food franchise.
Last month, the mean waiting time at the drive-through window for
branches in your geographical region, as measured from the time a
customer places an order until the time the customer receives the
order, was
3.7 minutes. You select a random sample of 64 orders. The sample
mean waiting time is 3.41 minutes, with a sample standard
deviation of 0.8 minute.
Find the p-value.
p-value= ( )
(Round to...

You are the manager of a restaurant for a fast-food franchise.
Last month, the mean waiting time at the drive-through window for
branches in your geographical region, as measured from the time a
customer places an order until the time the customer receives the
order, was 3.7 minutes. You select a random sample of 81 orders.
The sample mean waiting time is 3.41 minutes, with a sample
standard deviation of 0.9 minute. At the 0.01 level of
significance, is there...

28. You are the manager of a restaurant for a fast-food
franchise. Last month, the mean waiting time at the drive-through
window for branches in your geographical region, as measured from
the time a customer places an order until the time the customer
receives the order, was 3.8 minutes. You select a random sample of
81 orders. The sample mean waiting time is 3.99 minutes, with a
sample standard deviation of 0.9 minute.
At the 0.10 level of significance, is...

You are the manager of a restaurant for a fast-food franchise.
Last month, the mean waiting time at the drive-through window for
branches in your geographical region, as measured from the time a
customer places an order until the time the customer receives the
order, was 3.9 minutes. You select a random sample of 64 orders.
The sample mean waiting time is 3.67 minutes, with a sample
standard deviation of 0.8 minute. Complete parts (a) and (b)
below.
a. At...

You are the manager of a restaurant for a fast-food franchise.
Last month, the mean waiting time at the drive-through window for
branches in your geographical region, as measured from the time a
customer places an order until the time the customer receives the
order, was 3.9 minutes. You select a random sample of 81 orders.
The sample mean waiting time is 4.12 minutes, with a sample
standard deviation of 0.9 minute. Complete parts (a) and (b)
below.
A. At...

28. You are the manager of a restaurant for a fast-food
franchise. Last month, the mean waiting time at the drive-through
window for branches in your geographical region, as measured from
the time a customer places an order until the time the customer
receives the order, was 3.7 minutes. You select a random sample of
81 orders. The sample mean waiting time is 3.86 minutes, with a
sample standard deviation of 0.9 minute. Complete parts (a) and
(b) below.
a....

You are the manager of a restaurant for a? fast-food franchise.
Last? month, the mean waiting time at the? drive-through window for
branches in your geographical? region, as measured from the time a
customer places an order until the time the customer receives the?
order, was 3.8 minutes. You select a random sample of 81 orders.
The sample mean waiting time is 3.55 ?minutes, with a sample
standard deviation of 0.9 minute. Complete parts? (a) and? (b)
below. a. At...

Could you explain to how to find these answers in excel as well
please? I am having a terrible time trying to get it to work
correctly for me.
You are the manager of a restaurant for a fast-food franchise.
Last month, the mean waiting time at the drive-through window for
branches in your geographical region, as measured from the time a
customer places an order until the time the customer receives the
order, was 3.7 minutes. You select a...

1. You are the manager of a fast-food restaurant. The business
problem is to determine whether the population mean waiting time to
place an order has changed in the past month from its previous
population mean value of 4.5 minute. From the past experience, you
can assume that the population is normally distributed, with a
population standard deviation of 1.2 minutes. You select a sample
of 25 orders during a one-hour period. The sample mean is 5.1
minutes.
Determine whether...

The waiting time until a customer is served at a fast food
restaurant during lunch hours has a skewed distribution with a mean
of 2.4 minutes and a standard deviation of 0.4 minute. Suppose that
a random sample of 44 waiting times will be taken. Compute the
probability that the mean waiting time for the sample will be
longer than 2.5 minutes. Answer: (Round to 4 decimal places.)

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 9 minutes ago

asked 23 minutes ago

asked 25 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago