Exam 1: The Nature of Probability and Statistics

The dry weights(g) were calculated for samples of Zebra mussels obtained at several locations and at several depths in Lake Simcoe. The response variable would be classified as a ___________ variable. ________________________________________

Which of the following best defines the relationship between confounding, dependent, and independent variables?

What level of measurement classifies data into mutually exclusive (nonoverlapping), exhausting categories in which no order or ranking can be imposed on the data?

A magazine tests a new car and reports that it could be twice as fun to drive as its predecessor. This is NOT an example of

How might a telephone survey performed between the hours of 8 AM and 5 PM be biased?

The number of birds in a tree is an example of a continuous variable.

Each value in a data set may be referred to as either a data value or a(n)

Which of the following correctly describes the relationship between a sample and a population?

An independent variable can also be called a(n)

A dependent variable can also be referred to as an outcome variable.

______________ is a decision-making process for evaluating claims about a population, based on information obtained from samples. ________________________________________

What level of measurement would be applied when doing a survey on the average Canadian's shoe size?

In a

A television station interviews five movie viewers after the first showing of a movie. After finding out that all five enjoyed the movie very much, the reporter states that this movie will definitely be a big hit. This is an example of

If a weather centre monitors and calculates the number of lightning flashes per 100 square kilometres for Edmonton, Alberta each year, what type of variable would they be investigating?

The amount of time needed to run the Toronto marathon is an example of which type of variable?

Macrophytes were sampled at each of 3 depths in a particular region of Lake Opinicon. The macrophages obtained at each depth were classified as to their genus and their dry weights were also determined. One question that was studied was whether or not macrophyte dry weight differs at different depths and if the dry weight depended on the type of macrophage. The number of explanatory variables in this part of the study is ___________. ________________________________________

______________ sampling is used when the population is large or when it involves subjects residing in a large geographic area. ________________________________________

What type of sampling is being employed if the country is divided into economic classes and a sample is chosen from each class to be surveyed?

Management of an industrial company implements improvements in working conditions (better lighting) and finds that productivity is higher one year after implementation of these improved working conditions. This type of study is ___________ (observational, quasi-experimental, experimental). ________________________________________