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In: Statistics and Probability
The data table contains waiting times of customers at a bank, where customers enter a single...
The data table contains waiting times of customers at a bank, where customers enter a single waiting line that feeds three teller windows. Test the claim that the standard deviation of waiting times is less than 2.3 minutes, which is the standard deviation of waiting times at the same bank when separate waiting lines are used at each teller window. Use a significance level of 0.01. Complete parts (a) through (d) below. customer waiting times (in minutes) 8.1 7.2 6.4 6.6 6.4 7.1 6.7 6.8 8.5 6.1 8.6 6.6 14.9 7.1 6.9 7.3 7.2 6.8 7.7 8.4 8.7 7.8 6.5 11.9 7.3 6.2 6.3 7.8 7.5 6.1 12.4 6.4 6.9 9.9 4.9 7.7 6.1 7.8 6.4 7.4 14.8 7.5 8.9 7.2 7.1 6.1 7.7 6.6 7.8 6.9 6.4 6.2 6.1 7.2 6.8 7.7 6.6 7.3 8.6 7.7
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orchestra answered 2 years agoRelated Solutions
The data table contains waiting times of customers at a bank, where customers enter a single...
The data table contains waiting times of customers at a bank,
where customers enter a single waiting line that feeds three teller
windows. Test the claim that the standard deviation of waiting
times is less than 1.8 minutes, which is the standard deviation of
waiting times at the same bank when separate waiting lines are used
at each teller window. Use a significance level of 0.05. 1. Compute
the test statistic. 2.Find the P-value of the test statistic.
6.8
7.4...
The data table contains waiting times of customers at a bank, where customers enter a single...
The data table contains waiting times of customers at a bank,
where customers enter a single waiting line that feeds three teller
windows. Test the claim that the standard deviation of waiting
times is less than 1.5 minutes, which is the standard deviation of
waiting times at the same bank when separate waiting lines are used
at each teller window. Use a significance level of 0.05. Complete
parts (a) through (d) below.
A. Identify the null and alternative hypotheses for...
Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...
Waiting times (in minutes) of customers at a bank where all
customers enter a single waiting line and a bank where
customers wait in individual lines at three different teller
windows are listed below. Find the coefficient of variation for
each
of the two sets of data, then compare the variation.
Bank A (single line): 6.5 6.6 6.7 6.9 7.1 7.3 7.4 7.6 7.7 7.8
Bank B (individual lines): 4.4 5.4 5.7 6.2 6.7 7.7 7.8 8.4 9.4
9.9
The...
Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...
Waiting times (in minutes) of customers at a bank where all
customers enter a single waiting line and a bank where customers
wait in individual lines at three different teller windows are
listed below. Find the coefficient of variation for each of the two
sets of data, then compare the variation. Bank A (single line):
6.6 nbsp 6.6 nbsp 6.7 nbsp 6.8 nbsp 7.0 nbsp 7.3 nbsp 7.5 nbsp 7.7
nbsp 7.7 nbsp 7.8
Bank B (individual lines): 4.4 nbsp...
Waiting times (in minutes) of customers in a bank where all customers enter a single waiting...
Waiting times (in minutes) of customers in a bank where all
customers enter a single waiting line and a bank where customers
wait in individual lines at three different teller windows are
listed below. Find the mean and median for each of the two
samples, then compare the two sets of results. Single Line 6.5 6.6
6.7 6.8 7.0 7.1 7.5 7.6 7.6 7.6 Individual Lines 4.2 5.4 5.8 6.2
6.5 7.6 7.6 8.6 9.2 9.9 The mean waiting time...
Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...
Waiting times (in minutes) of customers at a bank where all
customers enter a single waiting line and a bank where customers
wait in individual lines at three different teller windows are
listed below. Find the coefficient of variation for each of the two
sets of data, then compare the variation. Bank A (single line):
6.5 6.6 6.7 6.8 7.1 7.4 7.4 7.6 7.7 7.8 Bank B (individual lines):
4.2 5.4 5.8 6.2 6.7 7.7 7.8 8.6 9.3 9.9
The coefficient...
14.Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...
14.Waiting times (in minutes) of customers at a bank where all
customers enter a single waiting line and a bank where customers
wait in individual lines at three different teller windows are
listed below. Find the coefficient of variation for each of the two
sets of data, then compare the variation
Bank A (single line)
Bank B (individual lines)
6.4
4.3
6.5
5.5
6.6
5.9
6.8
6.3
7.1
6.7
7.4
7.6
7.4
7.8
7.7
8.4
7.7
9.4
7.8
9.7
The...
The table below shows the time in minutes that customers spent waiting in a bank....
The table below shows the time in
minutes that customers
spent waiting in a
bank.
Time (min.)
Frequency
5
7
6-10
8
11-15
9
16-20
4
21-25
6
Calculate the mean, mode and
median [4+4 + 4]
(b) Calculate the
variance.
[5]
(c) Calculate the standard
deviation.
[2]
(d) Calculate the coefficient of
skewness
[3]
(e) Calculate the coefficient of variation.
The data to the right represent the number of customers waiting for a table at?6:00 P.M....
The data to the right represent the
number of customers waiting for a table at?6:00 P.M. for
40 consecutive Saturdays at? Bobak's Restaurant. Complete
parts?(a) through? (h) below.
5
9
3
4
9
5
4
3
11
10
4
6
2
5
3
7
7
11
6
2
6
4
5
8
13
10
8
2
7
5
5
10
6
10
4
6
3
5
8
4
Number of Customers
Frequency
1–3
7
4–6
18
7-9
8
10–12
6...
A local bank claims that the waiting time for its customers to be served is the...
A local bank claims that the waiting time for its customers to
be served is the lowest in the area. A competitor bank checks the
waiting times at both banks. The sample statistics are listed
below. Test the local bank's claim. Use the information given
below. Use the significant level of .05 and assume the variances
are equal.
sample size
Local Bank
n1 = 46
Competitor Bank
n2 = 50
Average waiting time in minutes for each sample
Xbar1 =...
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