Exam 1: Introduction and Data Collection

A personal computer user survey was conducted.The hours of personal computer use per week is an example of a ________ numerical variable.

The possible responses to the question "How many times in the past three months have you visited a city park?" are values from a discrete variable.

In purchasing a motor vehicle,there are a number of variables to consider.The colour of the car is an example of a ________ variable.

Data from a categorical variable can be measured on a ratio scale or on an interval scale,whilst data from a numerical variable are measured on a nominal scale or on an ordinal scale.

Which of the following is a discrete quantitative variable?

The Dean of Students conducted a survey on campus.Class designation (first year,second year,third year,honours)is an example of a ________ variable.

A marketing research firm,in conducting a comparative taste test,provided three types of peanut butter to a sample of households randomly selected within the state.Which of the 4 methods of data collection is involved when people are asked to compare the three types of peanut butter?

Most analysts focus on the cost of HECS fees as the way to measure the cost of a university education.But incidentals,such as textbook costs,are rarely considered.A researcher at the University of Adelaide wishes to estimate the textbook costs of first-year students at the University.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.

The number of defective apples in a single box will be measured on an interval scale.

The Vice Chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the proportion of students at her university who visited the campus bar on the weekend before the final exam period.Her advisor took a random sample of 250 students.The total number of students in the sample who visited the campus bar on the weekend before the final exam period is an example of

A personal computer user survey was conducted.The number of personal computers owned is an example of a ________ numerical variable.

Researchers suspect that the average number of units passed per semester by university students is rising.A researcher at Brisbane University wishes to estimate the number of units passed by students during the second semester at Brisbane.To do so,he randomly selects 100 student transcripts and records the number of units each student passed in second semester.He found that the average number of semester units passed was 6.85 units per student.Identify the population of interest to the researcher.

Instruction 1-1 The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a DVD recorder made by the company over the past 12 months are satisfied with their products. -Referring to Instruction 1-1,the possible responses to the question "How much time do you use the DVD player every week on the average?" are values from a

The classification of student year of study (first year,second year,third year,honours)is an example of

The amount of kilojoules contained in a 250 gram packet of cheese is an example of a discrete variable.

The possible responses to the question "How long have you been living at your current residence?" are values from a continuous variable.

Most analysts focus on the cost of HECS fees as the way to measure the cost of a university education.But incidentals,such as textbook costs,are rarely considered.A researcher at the University of Adelaide wishes to estimate the textbook costs of first-year students at the University.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.

A statistic is usually used to provide an estimate for a usually unobserved parameter.

Using the number of registered voters who turned out to vote for the primary in Victoria to predict the number of registered voters who will turn out to vote in Tasmania's primary is an example of descriptive statistics.

The Department of Health in Western Australia wanted to study malpractice litigation in Western Australia.A sample of 31,000 medical records was drawn from a population of 850,000 patients who were discharged during the year 2011.The true proportion of malpractice claims filed from the population of 850,000 patients is a ________.