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MATH 1280: Introduction to Statistics, Exams of Reasoning

Liberty University (LU)Reasoning

MATH 1280: Introduction to Statistics

Typology: Exams

2025/2026

Available from 05/26/2026

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MATH 1280: Introduction to
Statistics
⏹ 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. Answer: Select the correct answer in each of the
following 4 questions:
⏹ The population in this survey is: Answer: a. The researchers that
conducted the survey.
b. Customers that arrive at dealerships of the company. CORRECT
c. The automobile producing company.
d. Owners of cars that are produced by the company.
⏹ The sample in this survey is: Answer: a. The team that conducted the
survey.
b. Customers that arrive at dealerships of the company.
c. "Yes", "No", or "Refuse to Answer".
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MATH 1280: Introduction to

Statistics

⏹ 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. Answer: Select the correct answer in each of the following 4 questions: ⏹ The population in this survey is: Answer: a. The researchers that conducted the survey. b. Customers that arrive at dealerships of the company. CORRECT c. The automobile producing company. d. Owners of cars that are produced by the company. ⏹ The sample in this survey is: Answer: a. The team that conducted the survey. b. Customers that arrive at dealerships of the company. c. "Yes", "No", or "Refuse to Answer".

d. Customers that arrive at the selected dealerships during the day of visit. CORRECT ⏹ A parameter that may be targeted by this survey is: Answer: a. The percentage of costumers that possess a car made by the company. CORRECT 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 company. ⏹ A statistic that may be used to summarize the outcome of the survey is: Answer: a. "Yes". b. The percentage, among costumers that were interviewed, of those that do not possess a car made by the company CORRECT c. Customers that arrive at the selected dealerships during the day of visit. d. The team that conducted the survey. ⏹ The Customers Service Center of a large bank receive calls from customers. The number of incoming calls between 8:00 AM and 8: 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 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: Answer: a. A population. b. A sample. c. A statistic. CORRECT d. None of the above. ⏹ In which of the months the number of incoming calls between 8: AM and 8:10 AM tends to be smaller? Answer: a. September. b. February. CORRECT c. The number of incoming calls in both months is about the same. d. One cannot answer the question based on the given data. ⏹ The height of the fourth bar from the left of the bar plot for the month of February represents the fact that? Answer: a. In 4 of the days of the month of February there were 5 incoming calls. CORRECT b. In 5 of the days of the month of February there were 4 incoming calls. c. In 4 of the days of the month of February there were 2 incoming calls. d. In 2 of the days of the month of February there were 4 incoming calls. ⏹ The location of the highest bar of the bar plot for the month of September represents the fact that? Answer: a. 5 incoming calls came during 6 days of the month of February. b. 6 incoming calls came during 10 days of the month of September.

c. 6 incoming calls came during 5 days of the month of February. d. 10 incoming calls came during 6 days of the month of September. CORRECT