Quizzes - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
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11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
1/11
Homework 14
1
2
Your work has been saved and submitted
Written Nov 28, 2023 3:06 AM - Nov 28, 2023 3:13 AM
•
Attempt 2 of 2
Attempt Score
14 / 14 - A
Overall Grade (Highest Attempt)
14 / 14 - A
Question 1
1 / 1 point
For each of the following variables, identify the level of measurement
(nominal, ordinal, interval, or ratio).
(I) Traffic congestion (e.g. light, medium, heavy)
(II) Temperature (in Fahrenheit) of an office building
11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
2/11
Question 2
1 / 1 point
For each of the following variables, identify the type of variable (categorical
vs. numeric).
(I) Income tax brackets (e.g. Below $8925, $8925-36250, $36250-$87850,
etc)
(II) Temperature (in Fahrenheit) of an office building
Question 3
1 / 1 point
1)
(I) Ordinal , and (II) Nominal
2)
(I) Ordinal , and (II) Interval
3)
(I) Nominal , and (II) Ratio
4)
(I) Ratio , and (II) Interval
5)
(I) Ratio , and (II) Ratio
1)
(I) Categorical , and (II) Categorical
2)
There is no correct match.
3)
(I) Numeric , and (II) Numeric
4)
(I) Numeric , and (II) Categorical
5)
(I) Categorical , and (II) Numeric
11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
3/11
Choose the description which best describes the shape of this boxplot.
Question 4
1 / 1 point
The five-number summary for a dataset on Temperature is given in the table
below. Using this information, calculate the percent of values between 18.8
and 59.4.
1)
Contaminated
2)
Symmetric
3)
Bimodal
4)
Left-skewed
5)
Right-skewed
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11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
4/11
Question 5
1 / 1 point
The lifespans (in years) of ten beagles were 10; 9; 14; 12; 8; 13; 9; 10; 11; 11.
Calculate the mean of the dataset.
Hide ques±on 5 feedback
1)
100%
2)
0%
3)
50%
4)
75%
5)
25%
1)
1.89
2)
107
3)
10.5
4)
10
5)
10.7
Correct!
11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
5/11
Question 6
1 / 1 point
Ten students took a statistics final and their scores were 83.9; 80; 77.7; 84.5;
79.9; 77.4; 93.1; 88.9; 82; 69. Calculate the standard deviation of the dataset.
Hide ques±on 6 feedback
Question 7
1 / 1 point
Suppose that the middle 95% of speeding ticket fines on a highway fall
between 70.42 and 134.14. Give an approximate estimate of the standard
deviation of the speeding ticket fines. Assume the fine amount has a normal
distribution.
1)
816.4
2)
81.64
3)
81
4)
6.637
5)
6.296
Correct!
1)
7.965
2)
15.93
11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
6/11
Hide ques±on 7 feedback
Question 8
1 / 1 point
Suppose that the mean and standard deviation of the scores on a statistics
exam are 78.5 and 6.35, respectively, and are approximately normally
distributed. Calculate the proportion of scores above 59.
Hide ques±on 8 feedback
3)
31.86
4)
102.28
5)
-15.93
Correct!
1)
0.7488
2)
0.9989
3)
We do not have enough information to calculate the value.
4)
0.2512
5)
0.0011
Correct!
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11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
7/11
Question 9
1 / 1 point
If the scores per round of golfers on the PGA tour are approximately normally
distributed with mean 65.9 and standard deviation 1.73, what is the
probability that a randomly chosen golfer's score is below 65 strokes?
Hide ques±on 9 feedback
Question 10
1 / 1 point
A certain list of movies were chosen from lists of recent Academy Award Best
Picture winners, highest grossing movies, series movies (e.g. the Harry Potter
series, the Spiderman series), and from the Sundance Film Festival and are
being analyzed. The mean box office gross was $138.64 million with a
standard deviation of $11.2526 million. Given this information, 98.49% of
movies grossed greater than how much money (in millions)? Assume the
distribution is approximately normal.
1)
0.1685
2)
0.6985
3)
We do not have enough information to calculate the value.
4)
0.3015
5)
0.8315
Correct!
11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
8/11
Hide ques±on 10 feedback
Question 11
1 / 1 point
Suppose that the distribution of income in a certain tax bracket is
approximately normal with a mean of $44,198.21 and a standard deviation of
$4,247.693. Approximately 29.99% of households had an income less than
what dollar amount?
1)
We do not have enough information to calculate the value.
2)
114.25
3)
135.81
4)
163.03
5)
413.09
Correct!
1)
9,422,694
2)
41,969.5
3)
9,511,090
4)
We do not have enough information to calculate the value.
11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&inP…
9/11
Hide ques±on 11 feedback
Question 12
1 / 1 point
Apple's market share in the smart phone market represents a proportion of
0.1625. If Apple conducts a survey nationwide of 533 smart phone users,
what is the probability that less than 84 of the people are Apple users?
Hide ques±on 12 feedback
Question 13
1 / 1 point
5)
46,426.93
Correct!
1)
0.4069
2)
0.6383
3)
0.3617
4)
0.0226
5)
0.0452
Correct!
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11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&in…
10/11
According to a survey conducted by Deloitte in 2017, 0.4532 of U.S.
smartphone owners have made an effort to limit their phone use in the past.
In a sample of 90 randomly selected U.S. smartphone owners, what is the
probability that between 37 and 39 (inclusively) will have attempted to limit
their cell phone use in the past?
Hide ques±on 13 feedback
Question 14
1 / 1 point
Fill in the blanks. Suppose the probability at a light bulb factory of a bulb
being defective is 0.14. If a shipment of 127 bulbs is sent out, the number of
defective bulbs in the shipment should be around __________, give or take
__________. Assume each bulb is independent.
1)
0.6376
2)
0.7883
3)
0.1404
4)
0.2117
5)
0.0278
Correct!
1)
17.78 , 15.29
2)
127 , 3.9103
11/28/23, 12:11 AM
Aidan Veloso - STAT-2160-950 - Business Statistics - Elearning - Western Michigan University
https://elearning.wmich.edu/d2l/lms/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=566919&isprv=&qi=504953&cfql=0&dnb=0&fromQB=0&in…
11/11
Hide ques±on 14 feedback
Done
3)
3.9103 , 17.78
4)
17.78 , 3.9103
5)
17.78 , 0.14
Correct!
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