Exam 1: Introduction and Data Collection

The amount of alcohol consumed by a person per week is an example of a continuous variable.

One of the "big four" Australian banks is conducting research in order to understand the banking needs of Australian residents.Using data collected by the Australian Bureau of Statistics is an example of a ________ source.

In data collection,the most common technique to ensure proper representation of the population is to use a random sample.

A professor computing the sample average exam score of 20 students and using it to estimate the average exam score for the 1,500 students taking the exam is an example of inferential statistics.

Most universities admit students based on their achievements in a number of different areas.The total university entrance score achieved by a student is an example of a ________ numerical variable.

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.How long a person has been a licensed driver is an example of a ________ numerical variable.

A telecommunications provider conducted a survey on mobile phone usage in Australia.The number of years using a mobile phone is an example of a ________ numerical variable.

Tim was planning for a meeting with his boss to discuss a raise in his annual salary.In preparation,he wanted to use the Consumer Price Index to determine the percentage increase in his real (inflation-adjusted)salary over the last three years.Which of the 4 methods of data collection was involved when he used the Consumer Price Index?

A telecommunications provider conducted a survey on mobile phone usage in Australia.The length (in minutes)of the longest call made per month is an example of a ________ numerical variable.

The personnel director at a large company studied the eating habits of the company's employees.The director noted whether employees brought their own lunches to work,ate at the company cafeteria,or went out to lunch.The goal of the study was to improve the food service at the company cafeteria.This type of data collection would best be considered as

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.In this study,drawing conclusions on any one day about the true population characteristics based on information obtained from the sample is called ________.

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

The Quality Assurance Department of a large urban hospital is attempting to monitor and evaluate patient satisfaction with hospital services.Prior to discharge,a random sample of patients is asked to fill out a questionnaire to rate such services as medical care,nursing,therapy,laboratory,food,and cleaning.The Quality Assurance Department prepares weekly reports that are presented at the Board of Directors meetings and extraordinary/atypical ratings are easy to flag.True population characteristics estimated from the sample results each week are called ________.

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)are called ________.

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 that result in decisions concerning population characteristics based only on the sample results are called ________.

The Dean of Students conducted a survey on campus.Grade point average (GPA)is an example of a ________ numerical variable.

Faculty rank (professor to associate lecturer)is an example of discrete numerical data.

The numbers on football players' uniforms is an example of

In purchasing a motor vehicle,there are a number of variables to consider.The body style of the car (sedan,coupe,wagon,etc. )is an example of a ________ 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.In this study,the presentation and characterisation of the two main measures calculated each day (i.e. ,average number of damaged oranges per tree and proportion of trees having damaged oranges)is called ________.