Question

1. A company's customer support division wants to test to see if wait time for a consumer to talk to a representative is under 10 minutes. The manager proposes to test one case where a consumer was placed on hold. Is this a good testing strategy? If not what would be a better testing strategy? Could you form a Null Hypothesis or an Alternative Hypothesis? If yes, what would they be?

2. Use a specific example to explain what a point estimation is and what a confidence interval is.

Answer #1

A very busy and fancy restaurant records the wait time for each
customer that comes in. Below are 12 customers’ wait times (in
minutes):
51
60
59
72
80
83
54
66
61
81
66 62
1.The manager wants to know the percentage of wait times that
are greater than 55 minutes. According to the sample data, what
would be a point estimate of the true percentage of wait times that
are greater than 55 minutes?
2.Use this point estimate...

A very busy and fancy restaurant
records the wait time for each customer that comes in. Below are 12
customers’ wait times (in minutes):
51
60
59
72
80
83
54
66
61
81
66 62
1.The manager wants to know if there
is evidence that the true mean wait time is greater than 1 hour.
What are the null and alternative hypotheses to test the claim?
Will this be a one-sided or two-sided test?
2.Assuming that σ = 20...

A customer service phone line claims that the wait times before
a call is answered by a service representative is less than 3.3
minutes. In a random sample of 62 calls, the average wait time
before a representative answers is 3.26 minutes. The population
standard deviation is assumed to be 0.14 minutes. Can the claim be
supported at α=0.08?
Homework Help:
6VE. Second sample hypothesis testing from word problem to
implications for claim, with test statistic (Links to an external...

A.
A supermarket claims that the average wait time at the checkout
counter is less than 9 minutes. Assume that we know that
the standard deviation of wait times is 2.5 minutes. We will test
at 5% level of significance.
Consider
H0: mu >= 9
H1: mu < 9
A random sample of 50 customers yielded an average wait time of
8.2 minutes.
What is the critical value for the Zstat (the Z-test
statistic)?
(Provide two decimal places)____________
B.
Given the...

1. A manager wants to see if the night shift and the day shift
takes the same amount of breaks. What test should they use?
A. Student T-test
B. Test for homogeneity
C. Z-Score
D. None
2. A radio announcer claims that the high school volleyball team
has a mean win of 6. You want to show that it is higher than that.
What type of test would you use?
A. Right-tailed
B. Two-tailed
C. Left-tailed
D. All of above...

Q1. State the null and alternative hypotheses. A customer
service center claims the mean time a customer is "on hold" is less
than 2 minutes.
(a) H0: μ = 2 H1: μ <
2
(b) H0: μ < 2 H1: μ =
2
(c) H0: μ = 2 H1: μ >
2
(d) H0: μ > 2 H1: μ =
2
Q2. You are testing the claim that the mean cost of a new car is
more than $25,200. How...

6. When analyzing survey results from a two way table, the main
distinction between a test of independence and a test for
homogeneity is:
A.
How the degrees of freedom are calculated
B.
how the expected counts are calculated
C.
the number of samples obtained
D.
the number of rows in the two way table
E.
the number of columns in the two way table.
7. A controversial issue in the sport of professional soccer is
the use of instant...

1.
Let A denote the event that a particular stock
outperforms the market and let B denote the event that the
economy is experiencing rapid economic growth. Suppose that
P(A) = 0.40, P(B) = 0.50 and
P(A/B) is 0.20. Therefore, the two
events A and B are probabilistically
independent.
True
False
2.
A manager estimates that demand for their company's product will
increase within the next 2 quarters with probability 0.55. This is
an example of a
a.
objective probability...

QUESTION 26
Marketing can be defined as
simply being better than the competition.
the activities involved in selling better than the
competition.
the activities involved in marketing better than the
competition.
the activities involved in assessing and satisfying customer
needs.
2 points
QUESTION 27
When Campbell's leverages its core competency of making soup
adding new products such as "Cup of Soup" or "Chunky" it is using a
product development strategy known as
product line expansion.
product line extension.
product...

1. A city official claims that the proportion of all commuters
who are in favor of an expanded public transportation system is
50%. A newspaper conducts a survey to determine whether this
proportion is different from 50%. Out of 225 randomly chosen
commuters, the survey finds that 90 of them reply yes when asked if
they support an expanded public transportation system. Test the
official’s claim at α = 0.05.
2. A survey of 225 randomly chosen commuters are asked...

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