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Chapter7Quiz-MATH1123sectionOBFall2023_WebAssign.pdf
11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 1/9
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MATH1123, section OB, Fall 2023
Chapter 7 Quiz (Quiz) INSTRUCTOR
Hua He
Hawaii Paci�c University
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SUN, NOV 19, 2023
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11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 2/9
The article "More Communities Banning 'Television on a Stick'" describes an ongoing controversy over the distraction caused by digital billboards along highways. One study mentioned in the newspaper article is described in "Effects of Advertising Billboards During Simulated Driving." In this study, 48 people made a 9 km drive in a driving simulator. Drivers were instructed to change lanes according to roadside lane change signs. Some of the lane changes occurred near digital billboards. What was displayed on the digital billboard changed once during the time that the billboard was visible by the driver to simulate the changing digital billboards that appear along highways. Data from this study supported the theory that the time required to respond to road signs was greater when digital billboards were present.
Is the inference made one that involves estimation or one that involves hypothesis testing? (Hint: See Example 7.1.)
†
†
The inference made involves estimation.
The inference made involves hypothesis testing.
1. [1/1 Points] PECKSTAT3 7.1.003.DETAILS PREVIOUS ANSWERS MY NOTES
11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 3/9
The article "More Communities Banning 'Television on a Stick'" describes an ongoing controversy over the distraction caused by digital billboards along highways. One study mentioned in the newspaper article is described in "Effects of Advertising Billboards During Simulated Driving." In this study, 48 people made a 9 km drive in a driving simulator. Drivers were instructed to change lanes according to roadside lane change signs. Some of the lane changes occurred near digital billboards. What was displayed on the digital billboard changed once during the time that the billboard was visible by the driver to simulate the changing digital billboards that appear along highways. Data from this study supported the theory that the time required to respond to road signs was greater when digital billboards were present.
(a) What is the population of interest?
the 48 people that participated in the driving simulation
inexperienced drivers in the U.S.
people that drive along highways with digital billboards
all drivers in the U.S.
drivers who are distracted by digital billboards
(b) What claim was tested?
Drivers are more likely to have an automobile accident when digital billboards are present.
Drivers are less likely to have an automobile accident when digital billboards are present.
The time required to respond to road signs increases when digital billboards are present.
Drivers are more distracted by digital billboards when the display changes.
The time required to respond to road signs decreases when digital billboards are present.
(c) What additional information would help you decide if it is reasonable to generalize the conclusions of this study to the population of interest? (Select all that apply.)
the month in which the data was collected
the opinions of the researchers on digital billboards
the names of the researchers
the names of the drivers
if the drivers were randomly selected
(d) Assuming that the people who participated in the study are representative of the population of interest, do you think that the risk of an incorrect conclusion would have been lower, about the same, or higher if 100 people had participated instead of 48?
lower
about the same
higher
†
†
2. [–/4 Points] PECKSTAT3 7.1.004.DETAILS MY NOTES
11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 4/9
"Want to Lose More Fat? Skip Breakfast Before Workout" is the headline of a newspaper article describing a study comparing people who did endurance training without eating before training and people who ate before training. Twenty people were assigned at random to one of two six-week diet and exercise programs. Both groups followed a similar diet and performed the same daily morning exercise routine. The people in one group did the exercise routine prior to eating, and those in the other group ate first and then exercised. The resulting data supported the claim that those who do not eat prior to exercising burn a higher proportion of fat than those who eat before exercising. Is the inference made one that involves estimation or one that involves hypothesis testing?
†
The inference made involves estimation.
The inference made involves hypothesis testing.
3. [1/1 Points] PECKSTAT3 7.1.011.DETAILS PREVIOUS ANSWERS MY NOTES
11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 5/9
"Want to Lose More Fat? Skip Breakfast Before Workout" is the headline of a newspaper article describing a study comparing people who did endurance training without eating before training and people who ate before training. Twenty people were assigned at random to one of two six-week diet and exercise programs. Both groups followed a similar diet and performed the same daily morning exercise routine. The people in one group did the exercise routine prior to eating, and those in the other group ate first and then exercised. The resulting data supported the claim that those who do not eat prior to exercising burn a higher proportion of fat than those who eat before exercising.
(a) What is the population of interest?
U.S. adults
people who do endurance training
people who are trying to lose weight
people who eat breakfast
people who do not eat breakfast
(b) What claim was tested?
Do those people who do not eat prior to exercising gain more muscle mass than those who eat before exercising?
What is the optimal breakfast for endurance trainers to consume for peak performance?
Do those people who do not eat prior to exercising burn a higher proportion of fat than those who eat before exercising?
Do those people who do not eat prior to exercising perform better at endurance training?
(c) What additional information would help you decide if it is reasonable to generalize the conclusions of this study to the population of interest? (Select all that apply.)
if the subjects were randomly selected from the population of endurance trainers
the length of the endurance training
what the subjects in the control group ate
the opinions of the researchers on endurance trainers
(d) Assuming that the people who participated in the study are representative of the people in the population of interest, do you think that the risk of an incorrect conclusion would have been lower, about the same, or higher if 10 people had participated instead of 20?
lower
about the same
higher
†
4. [–/4 Points] PECKSTAT3 7.1.012.DETAILS MY NOTES
11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 6/9
Do teenage drivers believe talking on a cell phone while driving is less of a risk than texting while driving? This question was one of several considered by the authors of the paper "Demographic, Driving Experience, and Psychosocial Predictors of Adolescent Distracted Driving Beliefs." Data from the study could be used to see if there is support for the claim that the proportion of teens who believe that texting while driving is a serious or very serious risk is greater than the proportion of teens who believe that talking on a cell phone is a serious or very serious risk.
Answer the four key questions.
Q, Question Type: Estimation or hypothesis testing?
S, Study Type: Sample data or experiment data?
T, Type of Data: One variable or two? Categorical or numerical?
two categorical variables
two numerical variables
one numerical variable
one categorical variable
N, Number of Samples or Treatments: How many samples or treatments?
one treatment
two treatments
two samples
one sample
†
estimation
hypothesis testing
sample data
experimental data
5. [2/4 Points] PECKSTAT3 7.2.017.DETAILS PREVIOUS ANSWERS MY NOTES
11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 7/9
A study of fast-food intake is described in the paper "What People Buy From Fast-Food Restaurants." Adult customers at three hamburger chains (McDonald's, Burger King, and Wendy's) at lunchtime in New York City were approached as they entered the restaurant and were asked to provide their receipt when exiting. The receipts were then used to determine what was purchased and the number of calories consumed. The sample mean number of calories consumed was 857, and the sample standard deviation was 677. This information was used to learn about the mean number of calories consumed in a New York fast-food lunch.
Answer the four key questions.
Q, Question Type: Estimation or hypothesis testing?
S, Study Type: Sample data or experiment data?
T, Type of Data: One variable or two? Categorical or numerical?
one categorical variable
one numerical variable
two categorical variables
two numerical variables
N, Number of Samples or Treatments: How many samples or treatments?
one sample
one treatment
two samples
two treatments
†
estimation
hypothesis testing
sample data
experiment data
6. [2/4 Points] PECKSTAT3 7.2.022.DETAILS PREVIOUS ANSWERS MY NOTES
11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 8/9
"Spending on Favorite Drinks" is the title of a graph that appeared as part of the USA Snapshot series in the newspaper USA TODAY. This graph summarized data from a survey of adult Americans. Each survey participant reported how much they spend each month on various beverages, such as coffee, wine, and beer. These data were used to learn about the mean monthly spending for each type of beverage.
Answer the four key questions.
Q, Question Type: Estimation or hypothesis testing?
S, Study Type: Sample data or experiment data?
T, Type of Data: One variable or two? Categorical or numerical?
one categorical variable
one numerical variable
two categorical variables
two numerical variables
N, Number of Samples or Treatments: How many samples or treatments?
one sample
one treatment
two samples
two treatments
†
estimation
hypothesis testing
sample data
experiment data
7. [2/4 Points] PECKSTAT3 7.2.028.DETAILS PREVIOUS ANSWERS MY NOTES
11/17/23, 10:30 PM Chapter 7 Quiz - MATH1123, section OB, Fall 2023 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/last?dep=33177292 9/9
Researchers at the Medical College of Wisconsin studied 2,121 children between the ages of 1 and 4.† For each child in the study, a measure of iron deficiency and the length of time the child was bottle-fed were recorded. The resulting data were used to learn about whether there was a relationship between iron deficiency and the length of time a child is bottle-fed.
Answer the four key questions.
Q, Question Type: Estimation or hypothesis testing?
S, Study Type: Sample data or experiment data?
T, Type of Data: One variable or two? Categorical or numerical?
one categorical variable
one numerical variable
two categorical variables
two numerical variables
N, Number of Samples or Treatments: How many samples or treatments?
one sample
one treatment
two samples
two treatments
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estimation
hypothesis testing
sample data
experiment data
8. [2/4 Points] PECKSTAT3 7.2.503.XP.DETAILS PREVIOUS ANSWERS MY NOTES
