MATH 1280: Intro to Statistics UPDATED
ACTUAL Questions and CORRECT
Answers
The Customers Service Center of a large bank receive calls from customers. The number of
incoming calls between 8:00 AM and 8:10 AM in consecutive days were recorded. The number
of incoming calls during the working days of the month of September were 8, 10, 6, 7, 12, 7, 8,
7, 8, 6, 9, 4, 6, 14, 10, 10, 10, 10, 6, 10, 12, 7. The number of incoming calls during the working
days of the month of February were 9, 11, 14, 6, 4, 6, 7, 3, 3, 2, 5, 6, 6, 5, 6, 7, 5, 4, 3, 5. In light
of the description given, select the correct answer. The data used in the prompt above is best
described as:
a.A population.
b.A sample.
c.A parameter.
d.A statistic. - CORRECT ANSWER - b.A sample.
An automobile producing company operates car dealerships that sell its cars. In order to assess
the service costumers get at the dealerships, a team from the Customer Relationship Department
was assembled. The team was sent to 20 randomly selected dealerships. Each dealership was
visited once by the team for an entire working day. During a visit the team interviewed all the
customers that arrived at that dealership. One of the questions that each of the customers were
asked is: "Do you currently possess a car made by our company?" The answers were marked
down as "Yes", "No", or "Refuse to Answer", depending on the customer's response.The
population in this survey is:
a.The researchers that conducted the survey.
b.Customers that arrive at dealerships of the company.
c.The automobile producing company.
d.Owners of cars that are produced by the company. - CORRECT ANSWER -
b.Customers that arrive at dealerships of the company.
,A Lake Tahoe Community College instructor is interested in the mean number of days Lake
Tahoe Community College math students are absent from class during a quarter. The instructor's
sample produces a mean number of days absent of 3.5 days. This value is an example of:
a.parameter
b.data
c.statistic
d.variable - CORRECT ANSWER - c.statistic
An automobile producing company operates car dealerships that sell its cars. In order to assess
the service costumers get at the dealerships, a team from the Customer Relationship Department
was assembled. The team was sent to 20 randomly selected dealerships. Each dealership was
visited once by the team for an entire working day. During a visit the team interviewed all the
customers that arrived at that dealership. One of the questions that each of the customers were
asked is: "Do you currently possess a car made by our company?" The answers were marked
down as "Yes", "No", or "Refuse to Answer", depending on the customer's response. A
parameter that may be targeted by this survey is:
a. The percentage of costumers that possess a car made by the company.
b. Customers that arrive at the selected dealerships during the day of visit.
c. "Yes", "No", or "Refuse to Answer".
d. Owners of cars that are produced by the com - CORRECT ANSWER - a. The
percentage of costumers that possess a car made by the company.
The Customers Service Center of a large bank receive calls from customers. The number of
incoming calls between 8:00 AM and 8:10 AM in consecutive days were recorded. The number
of incoming calls during the working days of the month of September were 8, 10, 6, 7, 12, 7, 8,
7, 8, 6, 9, 4, 6, 14, 10, 10, 10, 10, 6, 10, 12, 7. The number of incoming calls during the working
days of the month of February were 9, 11, 14, 6, 4, 6, 7, 3, 3, 2, 5, 6, 6, 5, 6, 7, 5, 4, 3, 5. In light
of the description given, select the correct answer. The average number of calls recorded in the
object "Feb" is 5.85. The average in the object "Sep" is 8.5. The difference between these two
numbers is:
a.A population.
, b.A sample.
c.A statistic.
d.None of the above. - CORRECT ANSWER - c.A statistic.
We cannot determine if any of the third quartiles for the three graphs is different. - CORRECT
ANSWER - False
The standard deviation for graph b is larger than the standard deviation for graph a. - CORRECT
ANSWER - True
The medians for all three graphs are the same. - CORRECT ANSWER - True
In a right-skewed distribution, which is greater?
a. the mean
b. the median
c. the mode - CORRECT ANSWER - a. the mean
We are interested in the number of years' students in a particular elementary statistics class have
lived in California. The information in the following table is from the entire section.
What is the mode?
a. 19
b. 19.5
c. 14 and 20
d. 22.65 - CORRECT ANSWER - a. 19
ACTUAL Questions and CORRECT
Answers
The Customers Service Center of a large bank receive calls from customers. The number of
incoming calls between 8:00 AM and 8:10 AM in consecutive days were recorded. The number
of incoming calls during the working days of the month of September were 8, 10, 6, 7, 12, 7, 8,
7, 8, 6, 9, 4, 6, 14, 10, 10, 10, 10, 6, 10, 12, 7. The number of incoming calls during the working
days of the month of February were 9, 11, 14, 6, 4, 6, 7, 3, 3, 2, 5, 6, 6, 5, 6, 7, 5, 4, 3, 5. In light
of the description given, select the correct answer. The data used in the prompt above is best
described as:
a.A population.
b.A sample.
c.A parameter.
d.A statistic. - CORRECT ANSWER - b.A sample.
An automobile producing company operates car dealerships that sell its cars. In order to assess
the service costumers get at the dealerships, a team from the Customer Relationship Department
was assembled. The team was sent to 20 randomly selected dealerships. Each dealership was
visited once by the team for an entire working day. During a visit the team interviewed all the
customers that arrived at that dealership. One of the questions that each of the customers were
asked is: "Do you currently possess a car made by our company?" The answers were marked
down as "Yes", "No", or "Refuse to Answer", depending on the customer's response.The
population in this survey is:
a.The researchers that conducted the survey.
b.Customers that arrive at dealerships of the company.
c.The automobile producing company.
d.Owners of cars that are produced by the company. - CORRECT ANSWER -
b.Customers that arrive at dealerships of the company.
,A Lake Tahoe Community College instructor is interested in the mean number of days Lake
Tahoe Community College math students are absent from class during a quarter. The instructor's
sample produces a mean number of days absent of 3.5 days. This value is an example of:
a.parameter
b.data
c.statistic
d.variable - CORRECT ANSWER - c.statistic
An automobile producing company operates car dealerships that sell its cars. In order to assess
the service costumers get at the dealerships, a team from the Customer Relationship Department
was assembled. The team was sent to 20 randomly selected dealerships. Each dealership was
visited once by the team for an entire working day. During a visit the team interviewed all the
customers that arrived at that dealership. One of the questions that each of the customers were
asked is: "Do you currently possess a car made by our company?" The answers were marked
down as "Yes", "No", or "Refuse to Answer", depending on the customer's response. A
parameter that may be targeted by this survey is:
a. The percentage of costumers that possess a car made by the company.
b. Customers that arrive at the selected dealerships during the day of visit.
c. "Yes", "No", or "Refuse to Answer".
d. Owners of cars that are produced by the com - CORRECT ANSWER - a. The
percentage of costumers that possess a car made by the company.
The Customers Service Center of a large bank receive calls from customers. The number of
incoming calls between 8:00 AM and 8:10 AM in consecutive days were recorded. The number
of incoming calls during the working days of the month of September were 8, 10, 6, 7, 12, 7, 8,
7, 8, 6, 9, 4, 6, 14, 10, 10, 10, 10, 6, 10, 12, 7. The number of incoming calls during the working
days of the month of February were 9, 11, 14, 6, 4, 6, 7, 3, 3, 2, 5, 6, 6, 5, 6, 7, 5, 4, 3, 5. In light
of the description given, select the correct answer. The average number of calls recorded in the
object "Feb" is 5.85. The average in the object "Sep" is 8.5. The difference between these two
numbers is:
a.A population.
, b.A sample.
c.A statistic.
d.None of the above. - CORRECT ANSWER - c.A statistic.
We cannot determine if any of the third quartiles for the three graphs is different. - CORRECT
ANSWER - False
The standard deviation for graph b is larger than the standard deviation for graph a. - CORRECT
ANSWER - True
The medians for all three graphs are the same. - CORRECT ANSWER - True
In a right-skewed distribution, which is greater?
a. the mean
b. the median
c. the mode - CORRECT ANSWER - a. the mean
We are interested in the number of years' students in a particular elementary statistics class have
lived in California. The information in the following table is from the entire section.
What is the mode?
a. 19
b. 19.5
c. 14 and 20
d. 22.65 - CORRECT ANSWER - a. 19
