Exam 1: Defining and Collecting Data

A statistic is usually unobservable while a parameter is usually observable.

The amount of kilojoules contained in a 250 gram packet of cheese will be measured on a ratio scale.

Convenience sampling involves using a method that is easy or inexpensive.

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

If all items in a frame do not have an equal chance of being selected,then non-response error occurs.

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.A person's age is an example of a _________ numerical variable.

Managers need an understanding of statistics to be able to present and describe information accurately,draw conclusions about large populations based on small samples,improve processes,and make reliable forecasts.

The amount of time a student spent studying for an exam will be measured on a ratio scale.

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.

The amount of alcohol consumed by a person per week will be measured on an interval scale.

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.

A list of the items in the population of interest is known as the frame.

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

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

Non-response bias is caused when all items in a frame do not have an equal chance of being selected.

The amount of time a student spent studying for an exam is an example of a continuous 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 four methods of data collection was involved when he used the Consumer Price Index?

In a systematic sample,you select the first element randomly but then,afterward,choose every kth element.

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

A population is the totality of items or things under consideration.