Question 1

Classify the variable as qualitative or quantitative.
-the numbers on the shirts of a boyʹs football team
A) qualitative
B) quantitative

Accepted Answer

The numbers on the shirts of a boy's football team are used to identify or distinguish between players, not to measure or count anything, making them qualitative.

Question 2

Classify the variable as qualitative or quantitative.
-the number of calls received at a companyʹs help desk
A) quantitative
B) qualitative

Accepted Answer

The number of calls received at a company's help desk is a countable number, making it a quantitative variable.

Question 3

Determine whether the underlined value is a parameter or a statistic.
-A study of 3700 college students in the city of Pemblington found that 8% had been victims of violent crimes.
A) statistic
B) parameter

Accepted Answer

A statistic is a numerical measure that describes an aspect of a sample. Since the study involves a sample of 3700 college students from the city of Pemblington, rather than all college students in the city, the 8% figure is a statistic.

Question 4

A manufacturer of cellular phones has decided that an assembly line is operating satisfactorily if less than 0.05% of the phones produced per day are defective. To check the quality of a dayʹs production, the companydecides to randomly
Sample 10 phones from a dayʹs production to test for defects. Define the population ofinterest to the manufacturer.
A) all the phones produced during the day in question
B) the 10 phones sampled and tested
C) the 10 responses: defective or not defective
D) the 0.05% of the phones that are defective

Accepted Answer

The population of interest to the manufacturer includes all the phones produced during the day in question, as the goal is to ensure that less than 0.05% of these phones are defective.

Question 5

Which of the following is not true of statistics?
A) Statistics is used to answer questions with 100% certainty.
B) Statistics involves collecting and summarizing data.
C) Statistics can be used to organize and analyze information.
D) Statistics is used to draw conclusions using data.

Accepted Answer

Statistics cannot provide answers with 100% certainty; it deals with probabilities and estimations based on data.

Question 6

Classify the variable as qualitative or quantitative.
-the number of seats in a school auditorium
A) quantitative
B) qualitative

Accepted Answer

The number of seats in a school auditorium is a quantitative variable because it represents a countable number of items, which can be measured and expressed numerically.

Question 7

Classify the variable as qualitative or quantitative.
-the bank account numbers of the students in a class
A) qualitative
B) quantitative

Accepted Answer

Bank account numbers are used to categorize or identify individual accounts, not to measure or count a quantity, making them qualitative variables.

Question 8

Parking at a large university has become a very big problem. University administrators are interested indetermining the average parking time (e.g. the time it takes a student to find a parking spot) of its students. Anadministrator inconspicuously followed 180 students and carefully recorded their parking times. Identify thesample of interest to the university administration.
A) parking times of the 180 students
B) parking time of a student
C) location of the parking spot
D) type of car (import or domestic)

Accepted Answer

The sample of interest is the parking times of the 180 students because the university administrators are looking to determine the average parking time, and these are the observations they collected for that purpose.

Question 9

Which branch of statistics deals with the organization and summarization of collected information?
A) Descriptive statistics
B) Inferential statistics
C) Survey design
D) Computational statistics

Accepted Answer

Descriptive statistics is the branch of statistics that deals with the organization, summarization, and display of data. It includes techniques for presenting data through graphs, tables, and summary measures such as averages and standard deviations.

Question 10

A recent study attempted to estimate the proportion of Florida residents who were willing to spend more taxdollars on protecting the Florida beaches from environmental disasters. Forty-two hundred Florida residentswere surveyed. Which of the following is the population used in the study?
A) all Florida residents
B) the 4200 Florida residents surveyed
C) the Florida residents who were willing to spend more tax dollars on protecting the beaches from environmental disasters
D) all Florida residents who lived along the beaches

Accepted Answer

The population in the study refers to the entire group of individuals the research aims to understand or make inferences about, which in this case is all Florida residents. The survey of 4200 residents is a sample used to represent this larger group.

Question 11

The legal profession conducted a study to determine the percentage of cardiologists who had been sued formalpractice in the last three years. The sample was randomly chosen from a national directory of doctors.Identify the individuals in the study.
A) each cardiologist selected from the directory
B) the responses: have been sued/have not been sued for malpractice in the last three years
C) the doctorʹs area of expertise (i.e., cardiology, pediatrics, etc.)
D) all cardiologists in the directory

Accepted Answer

The individuals in the study are the specific cardiologists who were selected from the directory to determine if they had been sued for malpractice in the last three years.

Question 12

Administrators at a large university want to know the average debt incurred by their graduates. Surveys weremailed to 150 graduating seniors asking them to report their total student loan debt. Identify the population,sample, and individuals in the study.

Accepted Answer

The answer of Administrators at a large university want to...

Question 13

Mark retired from competitive athletics last year. In his career as a sprinter he had competed in the 100 -metersevent a total of 328 times. His average time for these 328 races was 10.25 seconds.
A) parameter
B) statistic

Accepted Answer

The average time of 10.25 seconds for all 328 races is a parameter because it describes a characteristic of the entire population of Mark's races.

Question 14

Determine whether the underlined value is a parameter or a statistic.
-Telephone interviews of 372 employees of a large electronics company found that 65% were dissatisfied withtheir working conditions.
A) statistic
B) parameter

Accepted Answer

A statistic is a numerical measure that describes an aspect of a sample. Since the 65% dissatisfaction rate comes from a sample of 372 employees, rather than all employees of the company, it is a statistic.

Question 15

Determine whether the underlined value is a parameter or a statistic.
-The average age of the 65 students in Ms. Hopeʹs political science class is 21 years 7 months.
A) parameter
B) statistic

Accepted Answer

The average age of all 65 students in Ms. Hope's class is a parameter because it describes a characteristic of the entire population of that class.

Question 16

Determine whether the underlined value is a parameter or a statistic.
-In a survey conducted in the town of Atherton, 25% of adult respondents reported that they had been involvedin at least one car accident in the past ten years.
A) statistic
B) parameter

Accepted Answer

A statistic is a numerical value that describes a sample, whereas a parameter is a numerical value that describes a population. Since the value given is from a survey (a sample of the population), it is considered a statistic.

Question 17

Determine whether the underlined value is a parameter or a statistic.
-51.5% of the residents of Idlington Garden City are female.
A) parameter
B) statistic

Accepted Answer

A parameter is a numerical value that describes a characteristic of a population. Since the statement refers to all residents of Idlington Garden City, it is describing a characteristic of a population, making it a parameter.

Question 18

Classify the variable as qualitative or quantitative.
-the colors of book covers on a bookshelf
A) qualitative
B) quantitative

Accepted Answer

The colors of book covers on a bookshelf are qualitative because they describe a characteristic or quality (color) rather than a numerical value.

Question 19

Determine whether the underlined value is a parameter or a statistic.
-28.2% of the mayors of cities in a certain state are from minority groups.
A) parameter
B) statistic

Accepted Answer

A parameter is a numerical characteristic of a population, and since the statement refers to all the cities in a certain state, it is describing a characteristic of the entire population of mayors in that state, making it a parameter.

Question 20

Parking at a large university has become a very big problem. University administrators are interested indetermining the average parking time (e.g. the time it takes a student to find a parking spot) of its students. Anadministrator inconspicuously followed 120 students and carefully recorded their parking times. Identify thepopulation of interest to the university administration.
A) the parking times of the entire set of students that park at the university
B) the parking times of the 120 students from whom the data were collected
C) the entire set of faculty, staff, and students that park at the university
D) the students that park at the university between 9 and 10 AM on Wednesdays

Accepted Answer

The population of interest is the entire set of students that park at the university, as the administration aims to determine the average parking time for its students, not just a sample or a specific subgroup.

Quiz 1: Data Collection

Classify the variable as qualitative or quantitative. -the numbers on the shirts of a boyʹs football team

Classify the variable as qualitative or quantitative. -the number of calls received at a companyʹs help desk

Determine whether the underlined value is a parameter or a statistic. -A study of 3700 college students in the city of Pemblington found that 8% had been victims of violent crimes.

Which of the following is not true of statistics?

Classify the variable as qualitative or quantitative. -the number of seats in a school auditorium

Classify the variable as qualitative or quantitative. -the bank account numbers of the students in a class

Which branch of statistics deals with the organization and summarization of collected information?

A recent study attempted to estimate the proportion of Florida residents who were willing to spend more taxdollars on protecting the Florida beaches from environmental disasters. Forty-two hundred Florida residentswere surveyed. Which of the following is the population used in the study?

The legal profession conducted a study to determine the percentage of cardiologists who had been sued formalpractice in the last three years. The sample was randomly chosen from a national directory of doctors.Identify the individuals in the study.

Administrators at a large university want to know the average debt incurred by their graduates. Surveys weremailed to 150 graduating seniors asking them to report their total student loan debt. Identify the population,sample, and individuals in the study.

Mark retired from competitive athletics last year. In his career as a sprinter he had competed in the 100 -metersevent a total of 328 times. His average time for these 328 races was 10.25 seconds.

Determine whether the underlined value is a parameter or a statistic. -Telephone interviews of 372 employees of a large electronics company found that 65% were dissatisfied withtheir working conditions.

Determine whether the underlined value is a parameter or a statistic. -The average age of the 65 students in Ms. Hopeʹs political science class is 21 years 7 months.

Determine whether the underlined value is a parameter or a statistic. -In a survey conducted in the town of Atherton, 25% of adult respondents reported that they had been involvedin at least one car accident in the past ten years.

Determine whether the underlined value is a parameter or a statistic. -51.5% of the residents of Idlington Garden City are female.

Classify the variable as qualitative or quantitative. -the colors of book covers on a bookshelf

Determine whether the underlined value is a parameter or a statistic. -28.2% of the mayors of cities in a certain state are from minority groups.