Question
In: Statistics and Probability
Two data sets are given below, each representing times (in minutes) to complete a given task...
Two data sets are given below, each representing times (in minutes) to complete a given task for two different samples of students.
Data Set A: 3.1, 4.7, 7.3, 8.1, 8.1, 8.7, 8.8, 9.1, 9.1, 9.2
Data Set B: 5.2, 5.6, 5.8, 6.9, 7.0, 7.7, 7.9, 8.5, 8.8, 12.5
Complete the back-to-back stem plot for data set B by adding the numbers that belong in each class below, using a class width of 1. Do not enter spaces between the numbers. If a class does not contain anything, then write the word "empty". Key: 3|1 = 3.1 minutes
5 |__________________________(Blank #1)
6 |__________________________(Blank #2)
7 |__________________________(Blank #3)
8 |__________________________(Blank #4)
9 |__________________________(Blank #5)
10|__________________________(Blank #6)
11|__________________________(Blank #7)
12|__________________________(Blank #8)
Blank #9: For both data sets, the mean is approximately 7.6 minutes and the standard deviation is approximately 2.0 minutes. The mean and standard deviation are not the best to use in comparing centers and spreads of these distributions because they are ______________ in shape.
Blank #10: Find the median and IQR for data set A, rounding to one decimal place if needed. Report your answer as median,IQR with no extra spaces or units.
Blank #11: Find the median and IQR for data set B, rounding to one decimal place if needed. Report your answer as median,IQR with no extra spaces or units.
Question 2 options:
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Solutions
orchestra answered 1 year agoRelated Solutions
The data below represent commute times (in minutes) and scores on a well-being survey. Complete parts...
The data below represent commute times (in minutes) and scores
on a well-being survey. Complete parts (a) through (d)
below.
Commute Time (minutes), x
5
15
25
40
60
84
105
Well-Being Index Score, y
69.2
68.1
67.2
66.5
65.3
64.7
62.8
(a) Find the least-squares regression line treating the
commute time, x, as the explanatory variable and the index score,
y, as the response variable.
y = [ ] x + [ ]
(b) Interpret the slope and y-intercept,...
The data below represent commute times (in minutes) and scores on a well-being survey. Complete parts...
The data below represent commute times (in minutes) and scores
on a well-being survey. Complete parts (a) through (d)
below.
Commute Time (minutes), x
55
1515
3030
3535
5050
8484
105105
Well-Being Index Score, y
69.169.1
67.867.8
66.266.2
65.865.8
64.564.5
62.362.3
59.959.9
(a) Find the least-squares regression line treating the
commute time, x, as the explanatory variable and the index score,
y, as the response variable.
ModifyingAbove y with caretyequals=nothingxplus+left parenthesis
nothing right parenthesis
(Round to three decimal places as...
The data below represent commute times (in minutes) and scores on a well-being survey. Complete parts...
The data below represent commute times (in minutes) and scores
on a well-being survey. Complete parts (a) through (d) below.
Commute Time (minutes), x 5 15 30 40 50 84 105 Well-Being Index
Score, y 68.9 67.6 65.8 64.9 64.0 61.5 58.8 (a) Find the
least-squares regression line treating the commute time, x, as the
explanatory variable and the index score, y, as the response
variable. ModifyingAbove y with caret equalsnothingxplusleft
parenthesis nothing right parenthesis (Round to three decimal
places...
Given below is simple random sample data for wait times, in minutes, for a call center....
Given below is simple random sample data for wait times, in
minutes, for a call center. At the 98% confidence level, calculate
the confidence interval estimate for the variance in wait time for
the population of all calls at the call center. Assume the
population is normally distributed. 12.1 11.5 13.4 16.2 11.3 12.2
11.3
The file P08_06.xlsx contains data on repetitive task times for each of two workers. John has...
The file P08_06.xlsx contains data on repetitive task times for
each of two workers. John has been doing this task for months,
whereas Fred has just started. Each time listed is the time (in
seconds) to perform a routine task on an assembly line. The times
shown are in chronological order. a. Calculate a 95% confidence
interval for the standard deviation of times for John. Do the same
for Fred. What do these indicate? b. Given that these times are...
The data below shows the high temperatures and the times (in minutes) runners who won a...
The data below shows the high temperatures and the times (in
minutes) runners who won a marathon. Answer parts a-c.
Temperature (x)
5858
63
50
62
72
73
50
57
Time (y)
1145.882
146.683
145.931
146.604
147.965
144.267
148.503
147.643
a. Find the value of the linear correlation coefficient r.
b. Find the critical values of r from the table showing the
critical values for the Pearson correlation coefficient using
alpha=0.05
c. Is there sufficient evidence to conclude that there...
Using Minitab and given the data sets below a) determine if there is a difference in...
Using Minitab and given the data sets below a) determine if
there is a difference in the means at an alpha level 0.05; b)
determine if the variability of data set A is larger.
Data A
Data B
35.8
40.9
40.4
35.7
30.3
36.7
46.8
37.3
34.1
41.8
34.0
39.9
39.1
34.6
45.0
38.8
41.9
35.8
40.2
35.6
The values listed below are waiting times? (in minutes) of customers at two different banks. At...
The values listed below are waiting times? (in minutes) of
customers at two different banks. At Bank? A, customers enter a
single waiting line that feeds three teller windows. At Bank? B,
customers may enter any one of three different lines that have
formed at three teller windows. Answer the following questions.
Bank A 6.36.3 6.66.6 6.76.7 6.86.8 7.17.1 7.37.3 7.47.4 7.87.8
7.87.8 7.87.8 Bank Upper BBank B 4.24.2 5.45.4 5.85.8 6.26.2 6.76.7
7.77.7 7.77.7 8.68.6 9.39.3 10.010.0 Construct aa...
The values listed below are waiting times (in minutes) of customers at two different banks. At...
The values listed below are waiting times (in minutes) of
customers at two different banks. At Bank A, customers enter a
single waiting line that feeds three teller windows. At Bank B,
customers may enter any one of three different lines that have
formed at three teller windows. Answer the following questions.
Bank A 6.4 6.6 6.7 6.8 7.1 7.3 7.4 7.7 7.7 7.7 Bank B 4.1 5.3 5.9
6.2 6.8 7.6 7.6 8.4 9.4 10
Construct a 99% confidence...
The values listed below are waiting times (in minutes) of customers at two different banks. At...
The values listed below are waiting times (in minutes) of
customers at two different banks. At Bank A, customers enter a
single waiting line that feeds three teller windows. At Bank B,
customers may enter any one of three different lines that have
formed at three teller windows. Answer the following questions.
Bank A
6.46.4
6.66.6
6.76.7
6.86.8
7.17.1
7.27.2
7.57.5
7.87.8
7.87.8
7.87.8
Bank Upper BBank B
4.24.2
5.35.3
5.85.8
6.16.1
6.76.7
7.87.8
7.87.8
8.48.4
9.49.4
10.010.0
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