Is a response to the question “By which methods do you feel you find the best candidates?” categorical or numerical?

CHAPTER ONE HOMEWORK

 

1. True or False

 

1. The type of TV one owns is an example of an ordinal scaled variable.
2. Whether the university is private or public is an example of a nominal scaled variable.
3. Marital status is an example of a numerical variable.

 

1. Multiple choices

 

1. The process of using sample statistics to draw conclusions about true population parameters is called

1. statistical inference.
2. the scientific method.
4. descriptive statistics.

1. Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the various features of that set of data are called

1. statistical inference.
2. the scientific method.
4. descriptive statistics.

1. The universe or “totality of items or things” under consideration is called

1. a sample.
2. a population.
3. a parameter.
4. a statistic.

1.  The portion of the universe that has been selected for analysis is called

1. a sample.
2. a frame.
3. a parameter.
4. a statistic.

1. A summary measure that is computed to describe a characteristic from only a sample of the population is called

1. a parameter.
2. a census.
3. a statistic.
4. the scientific method.

1. A summary measure that is computed to describe a characteristic of an entire population is called

1. a parameter.
2. a census.
3. a statistic.
4. the scientific method.

1. Which of the following is most likely a population as opposed to a sample?

1. respondents to a newspaper survey
2. the first 5 students completing an assignment
3. every third person to arrive at the bank
4. registered voters in a county

 

1. Which of the following is most likely a parameter as opposed to a statistic?

1. the average score of the first five students completing an assignment
2. the proportion of females registered to vote in a county
3. the average height of people randomly selected from a database
4. the proportion of trucks stopped yesterday that were cited for bad brakes

1. Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals, such as textbook costs, are rarely considered. A researcher at Drummand University wishes to estimate the textbook costs of first-year students at Drummand. To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $300 per semester. Identify the population of interest to the researcher.

1. all Drummand University students
2. all college students
3. all first-year Drummand University students
4. the 250 students that were monitored

1. Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals, such as textbook costs, are rarely considered. A researcher at Drummand University wishes to estimate the textbook costs of first-year students at Drummand. To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $300 per semester. Identify the variable of interest to the researcher

1. the textbook cost of first-year Drummand University students
2. the year in school of Drummand University students
3. the age of Drummand University students
4. the cost of incidental expenses of Drummand University students

1. Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals, such as textbook costs, are rarely considered. A researcher at Drummand University wishes to estimate the textbook costs of first-year students at Drummand. To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $300 per semester. Identify the sample in the study.

1. all Drummand University students
2. all college students
3. all first-year Drummand University students
4. the 250 students that were monitored

1. Which of the following is a discrete quantitative variable?

1. the Dow Jones Industrial average
2. the volume of water released from a dam
3. the distance you drove yesterday.
4. the number of employees of an insurance company

1. Which of the following is a continuous quantitative variable?

1. the color of a student’s eyes
2. the number of employees of an insurance company
3. the amount of milk produced by a cow in one 24-hour period
4. the number of gallons of milk sold at the local grocery store yesterday

1. The classification of student class designation (freshman, sophomore, junior, senior) is an example of

1. a categorical random variable.
2. a discrete random variable.
3. a continuous random variable.
4. a parameter.

 

• Solve the following problems in separate sheets of paper.

 

1.  According to a Harris Interactive survey of 502 senior human resource executives, 58% responded that referrals were one of the methods for finding the best candidates.

1. Describe the population for the Harris Interactive survey.
2. Is a response to the question “By which methods do you feel you find the best candidates?” categorical or numerical?
3. Fourteen percent of the senior human resources executives polled indicated that professional associations were one of the methods for finding the best candidates. Is this a parameter or a statistic?

 

 

1. A Wall Street Journal poll asked 2,150 adults in the United States a series of questions to find out their view on the U.S. economy.

1. What is the population of interest?
2. What is the sample?
3. Is a response to the question “How satisfied are you with the U.S. economy today with 1 = very satisfied, 2 = moderately satisfied, 3 = neutral, 4 = moderately dissatisfied and 5 = very dissatisfied?” a categorical or numerical?
4. Is a response to the question “How many people in your household are unemployed currently?” a discrete or continuous variable?