Question 1

The Department of Transportation of a city has noted that on the average there are 17 accidents per day. The average number of accidents is an example of

Accepted Answer

The average number of accidents is a piece of data that falls under the field of data and statistics. Statistical inference involves making conclusions about a larger population based on a sample, but no sample or population is mentioned in this scenario.

Question 2

The height of a building, measured in feet, is an example of

Accepted Answer

The height of a building is a numerical measurement and therefore falls under the category of quantitative data.

Question 3

In a data set, the number of elements will always be the same as the number of

Accepted Answer

The answer of In a data set, the number of...

Question 4

The collection of all elements of interest in a particular study is

Accepted Answer

The population refers to the entire group of individuals or objects that the researcher is interested in studying. This includes all possible elements of interest, and is the collection from which samples are drawn for statistical analysis.

Question 5

In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent

Accepted Answer

The answer of In a post office, the mailboxes are...

Question 6

The scale of measurement that is simply a label for the purpose of identifying the attribute of an element is the

Accepted Answer

Nominal scale is used for identification purposes and does not possess any inherent order or hierarchy. It simply provides a label or name for each attribute being measured.

Question 7

The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the average age of all the students at City College

Accepted Answer

The sample mean (average age) of 22 is just one possibility within the range of possible population means. The actual population mean could be larger, smaller or equal to 22. Therefore, choice D is the correct answer.

Question 8

The weight of a candy bar in ounces is an example of

Accepted Answer

The weight of a candy bar is a numerical value that can be measured, making it an example of quantitative data.

Question 9

In a sample of 400 students in a university, 80, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of

Accepted Answer

The report makes a generalization about the entire university population based on the sample data, which is an example of statistical inference.

Question 10

Five hundred residents of a city are polled to obtain information on voting intentions in an upcoming city election. The five hundred residents in this study is an example of an)

Accepted Answer

The 500 residents in this study are a sample because they represent a smaller subset of the overall population of the city. A census would involve collecting data from every member of the population (in this case, every resident of the city). Observation refers to simply watching and recording data without any intervention, and population refers to the entire group being studied.

Question 11

One hundred students from a large university were asked about their opinion on the new health care program. The 100 represents

Accepted Answer

The 100 students represent a subset of the larger population of students at the university. They were selected as a representative sample to gather their opinions on the new health care program.

Question 12

Which of the following variables use the ratio scale of measurement?

Accepted Answer

Income uses the ratio scale of measurement as it has a true zero point and a meaningful ratio between values (e.g. someone earning $50,000 per year earns twice as much as someone earning $25,000 per year).

Question 13

Which of the following is a scale of measurement?

Accepted Answer

Ratio is a scale of measurement that has a true zero point, meaning that it allows for meaningful comparisons of ratios between values (e.g. height, weight, distance). Primal and remedial are not scales of measurement, and divisional is not a recognized term in the field of measurement.

Question 14

A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the average age of all the students in the university is 24 years. This is an example of

Accepted Answer

This statement represents a statistical inference, which is a conclusion made about a larger population based on a sample of data. The professor used the sample of ages from the students in their class to make an inference about the average age of all students in the university.

Question 15

The process of analyzing sample data in order to draw conclusions about the characteristics of a population is called

Accepted Answer

Statistical inference is the process of using sample data to draw conclusions about a population. It involves making estimates, testing hypotheses, and making predictions. Data analysis and summarization are important components of statistical inference, but do not encompass the entire process. Data and statistics are broader concepts that include the collection, organization, and presentation of data, but do not necessarily involve drawing conclusions about a population.

Question 16

The owner of a factory regularly requests a graphical summary of all employees' salaries. The graphical summary of salaries is an example of

Accepted Answer

The graphical summary represents data and statistics, specifically the distribution of salaries among the employees. A sample would be a subset of the employees' salaries, statistical inference would involve making predictions about the population of employees' salaries based on the sample, and an experiment would involve manipulating a variable to observe its effect on salaries. None of these concepts are applicable to the given scenario.

Question 17

A portion of the population selected to represent the population is called

Accepted Answer

A sample is a portion of the population that is selected to represent the entire population. Statistical inference is the process of making conclusions about the entire population based on the characteristics of the sample. Data and Statistics refers to the collection, analysis, interpretation, presentation, and organization of data. A census is a complete enumeration of a population.

Question 18

Which scale of measurement can be either numeric or nonnumeric?

Accepted Answer

The answer of Which scale of measurement can be either...

Question 19

Which of the following is not a scale of measurement?

Accepted Answer

"Primal" is not a recognized scale of measurement in statistics or research methodology. The other three options (nominal, ordinal, and interval) are established scales with specific characteristics and uses.

Question 20

Since a sample is a subset of the population, the sample mean

Accepted Answer

The sample mean can be larger, smaller, or equal to the mean of the population, depending on the specific sample that is taken. The sample mean is an estimate of the population mean, but it may not be exactly equal due to random sampling variability. This variability means that each sample may have a different mean, and some may be higher or lower than the population mean.

Quiz 1: Data and Statistics