Self-Quiz Unit 1 Statistics Question and Answers

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Question 1 text

An interview was conducted to determine the different types of houses in a locality. Identify the type of data.
Question 1Answer

a.

qualitative

b.

quantitative

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Question 2 text

A market researcher polls every tenth person who walks into a store. Determine the type of sampling used.
Question 2Answer

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a.

simple random

b.

stratified

c.

systematic

d.

cluster

e.

convenience

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Question 3 text

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 statistic that may be used to summarize the outcome of the survey is:
Question 3Answer

a.

“Yes”.

b.

The percentage, among costumers that were interviewed, of those that do not possess a car made by the company

c.

Customers that arrive at the selected dealerships during the day of visit.

d.

The team that conducted the survey.
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Question 4 text

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 location of the highest bar of the bar plot for the month of September represents the fact:
Question 4Answer

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.

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Question 5 text

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. In which of the months the number of incoming calls between 8:00 AM and 8:10 AM tends to be smaller?
Question 5Answer

a.

September

b.

February

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 correct answer is: February
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