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Statistics
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Apr 3, 2024
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Question 1
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A researcher is studying yearly consumption of soft drinks by children in North America. 250 children in North America are randomly selected
and their yearly soft drink consumption is measured to be 36.3 gallons. The sample is...
a.
All children in North America
b.
The yearly soft drink consumption of all North American children
c.
The yearly soft drink consumption of these 250 North American children
d.
These 250 North American children
Your answer is correct.
The correct answer is:
These 250 North American children
3/28/24, 1:08 PM
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Question 2
Correct
1.00 points out of 1.00
For each description below, choose the best answer to describe the data type. Answers may be re-used. Weight of campers' backpacks for a 3-day hike.
Number of public mailboxes in a town.
Number of people present in a hospital operating room.
The weight of a cell phone.
Continuous
Discrete
Discrete
Continuous
Your answer is correct.
The correct answer is:
Weight of campers' backpacks for a 3-day hike. → Continuous
Number of public mailboxes in a town. → Discrete
Number of people present in a hospital operating room. → Discrete
The weight of a cell phone. → Continuous
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Question 3
Correct
1.00 points out of 1.00
Question 4
Correct
1.00 points out of 1.00
A human resources director wants to give a survey to employees at a large company to study morale. She is trying to decide on the best way
to select which employees to be included in her sample. For each description below, match the type of sample used. (Not all types will be
used.)
She hands the survey to the first 20 employees she sees walking past her office.
From a randomized master list of all employees, she sends the survey to every 15
person.
From a master directory of all employees, she uses a random number generator to select 1000 employees to
receive the survey.
The company has 15 departments. She randomly chooses a number of employees from each department,
proportional to the size of the department.
Convenience
th
Systematic
Simple Random
Stratified
Your answer is correct.
The correct answer is:
She hands the survey to the first 20 employees she sees walking past her office. → Convenience
From a randomized master list of all employees, she sends the survey to every 15
person. → Systematic
From a master directory of all employees, she uses a random number generator to select 1000 employees to receive the survey. →
Simple Random
The company has 15 departments. She randomly chooses a number of employees from each department, proportional to the size of
the department. → Stratified
th
The average number of miles a licensed adult in the US drives per day is 24. A random sample of 49 licensed adults in the US is collected and
the average number of miles they drove was 22.8. The parameter of interest is...
a.
The 49 sampled licensed adults
b.
All licensed adults in the US
c.
The average number of miles all licensed adults in the US drive
d.
The average number of miles these 49 licensed adults in the US drive
Your answer is correct.
The correct answer is:
The average number of miles all licensed adults in the US drive
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Question 5
Partially correct
0.17 points out of 1.00
Question 6
Incorrect
0.00 points out of 1.00
Select all of the following which are true.
In a simple random sample, the problem of response bias may occur if:
Select one or more:
a.
Some individuals that are selected speak another language and therefore are not able to answer the interviewer's questions.
b.
Some individuals who answer the questions lie because they are embarrassed to reveal the truth to the interviewer.
c.
The sampling frame does not contain all individuals in the population.
d.
Some individuals who answer the questions exaggerate their responses because they believe it is what the interviewer wants to hear.
e.
Some individuals that are randomly selected refuse to participate.
Your answer is partially correct.
You have correctly selected 1.
The correct answers are: Some individuals who answer the questions lie because they are embarrassed to reveal the truth to the interviewer.,
Some individuals who answer the questions exaggerate their responses because they believe it is what the interviewer wants to hear.
The average number of miles a licensed adult in the US drives per day is 24. A random sample of 49 licensed adults in the US is collected and
the average number of miles they drove was 22.8. The statistic is...
a.
The 49 sampled licensed adults
b.
All licensed adults in the US
c.
The average number of miles these 49 licensed adults in the US drive
d.
The average number of miles all licensed adults in the US drive
Your answer is incorrect.
The correct answer is:
The average number of miles these 49 licensed adults in the US drive
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Question 7
Correct
1.00 points out of 1.00
Question 8
Partially correct
0.75 points out of 1.00
The average number of miles a licensed adult in the US drives per day is 24. A random sample of 49 licensed adults in the US is collected and
the average number of miles they drove was 22.8. The population of interest is...
a.
The 49 sampled licensed adults
b.
All licensed adults in the US
c.
The average number of miles these 49 licensed adults in the US drive
d.
The average number of miles all licensed adults in the US drive
Your answer is correct.
The correct answer is:
All licensed adults in the US
For each description below, choose the best answer to describe the data type. Answers may be re-used. Length (in days) of hospital stay for surgical patients.
The number of bags of garbage discarded by residents in an apartment building.
Movie rating (G, PG, PG-13, R).
Marital status of dental hygienists in a dental office.
Quantitative
Quantitative
Categorical
Neither
Your answer is partially correct.
You have correctly selected 3.
The correct answer is:
Length (in days) of hospital stay for surgical patients. → Quantitative
The number of bags of garbage discarded by residents in an apartment building. → Quantitative
Movie rating (G, PG, PG-13, R). → Categorical
Marital status of dental hygienists in a dental office. → Categorical
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Question 9
Correct
1.00 points out of 1.00
Question 10
Incorrect
0.00 points out of 1.00
The overall goal of the field of Statistics is to... a.
Use representative samples to answer questions about a population of interest.
b.
Use population data to answer questions about random samples.
c.
Use randomly collected parameters to answer questions about populations of interest.
d.
Randomly collect data from populations of interest.
Your answer is correct.
The correct answer is:
Use representative samples to answer questions about a population of interest.
A local politician is interested in the public opinion regarding a tax increase to fund improvements to the local public transportation services in
Wake County. She decided to take a random sample of 16 voting precincts and polls all the registered voters within those precincts. (Assume
that every voter in each of the 16 precincts responds to the poll.)
This is an example of:
a.
Cluster Sampling b.
Convenience Sampling
c.
Stratified Sampling
d.
Simple Random Sampling
e.
Systematic Sampling
Your answer is incorrect.
The correct answer is:
Cluster Sampling ◄ ICA 1 Feedback
Jump to...
ICA 1 Key ►
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