Exam 1: Introduction and Data Collection

A statistics student found a reference in the campus library that contained the median family incomes for all Australian states and territories.She would report her data as being collected using

The Human Resources Director of a large corporation wishes to develop an employee benefits package and decides to select 500 employees from a list of all (N = 40,000)workers in order to study their preferences for the various components of a potential package.In this study,methods involving the collection,presentation,and characterisation of the data are called ________.

The Dean of Students conducted a survey on campus.The gender of the student is an example of a ________ variable.

The answer to the question "What is your favourite colour?" is an example of a continuous variable.

The classification of student major (accounting,economics,management,marketing,other)is an example of

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.The distance a person drives in a year is an example of a ________ variable.

The number of defective apples in a single box is an example of a continuous variable.

The oranges grown on commercial farms in Victoria were damaged by some unknown fungi a few years ago.Suppose the manager of a large orchard wanted to study the impact of the fruit flies on the orange crops on a daily basis over a 6-week period.On each day a random sample of orange trees were selected from within a random sample of acres.The daily average number of damaged oranges per tree and the proportion of trees having damaged oranges were calculated.The two main measures calculated each day (i.e. ,average number of damaged oranges per tree and proportion of trees having damaged oranges)may be used on a daily basis to estimate the respective true population ________.

A study is under way in the Otway National Park to determine the mature height of Mountain Ash gum trees.Specifically,the study is attempting to determine what factors aid a tree in reaching heights greater than 60 metres tall.It is estimated that the park contains 25,000 mature Mountain Ash gum trees.The study involves collecting heights from 250 randomly selected mature Mountain Ash gum trees and analysing the results.Identify the population from which the study was sampled.

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

Which of the 4 methods of data collection is involved when a person counts the number of cars passing designated locations on the Melbourne CityLink freeway system?

A continuous variable may take on any value within its relevant range even though the measurement device may not be precise enough to record it.

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 and computed the portion of students in the sample who visited the campus bar on the weekend before the final exam.The portion of all students at her university who visited the campus bar on the weekend before the final exam period is an example of

A sample is the portion of the universe that is selected for analysis.

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.The number of tickets a person has received in the last three years is an example of a ________ numerical variable.

A telecommunications provider conducted a survey on mobile phone usage in Australia.The responses on "whether all mobile phones in the household use the same telecommunications provider" is an example of a ________ variable.

Compiling the number of registered voters who turned out to vote for the members of parliament in Victoria is an example of descriptive statistics.

Which of the following is a continuous quantitative variable?

Student grades (A to D)are an example of continuous numerical data.

The Dean of Students conducted a survey on campus.The number of clubs,groups,teams,and organisations affiliated with on campus is an example of a ________ numerical variable.