Exam 2: Statistics and the Research Process

Suppose you are interested in how participants perform under different temperature conditions.You randomly select 30 participants and randomly assign them to work in one of three rooms.The rooms differ only with respect to temperature.You instruct all participants to solve the same jigsaw puzzle,and then you measure how long it takes each one to finish.In this research,the experimenter is investigating whether

A researcher investigates whether there is a relationship between hours spent watching television and children's vocabulary by asking 40 randomly selected 11-year-olds how many hours of television they watch per week and then having them take a vocabulary test.What is the independent variable in this study?

A representative sample is one that

Of the following data sets,which shows a relationship?

Which of the following is the most accurate statement with regard to random sampling and the representativeness of the sample obtained?

Which of the following orders lists the scales of measurement from the scale that provides the least specific information to the scale that provides the most specific information?

When there is no consistent pattern between two variables,there is said to be

Suppose you randomly select 40 participants,measure the length of each one's index finger,and also administer an IQ test to each.The dependent variable in this study is

Suppose you are interested in how participants perform under different temperature conditions.You randomly select 30 participants and randomly assign them to work in one of three rooms.The rooms differ only with respect to temperature.You instruct all participants to solve the same jigsaw puzzle,and then you measure how long it takes each one to finish.The dependent variable in this research is the

Although researchers discuss the population of individuals,in statistics we talk of the population of

In a(n)_____,the experimenter measures scores on both variables,whereas in a(n)_____,the experimenter manipulates or changes one variable and measures scores on the other.

Which measurement scale includes a zero,but not a true zero?

The logic behind samples and populations is that

Which of the following statements is descriptive?

The extent to which close to one value of Y is consistently associated with one and only one value of X is called

"Watch for me on the football field.I'll be wearing number 32." The scale of measurement involved in this statement is

Suppose you are interested in how participants perform under different temperature conditions.You randomly select 30 participants and randomly assign them to work in one of three rooms.The rooms differ only with respect to temperature.You instruct all participants to solve the same jigsaw puzzle,and then you measure how long it takes each one to finish.This research is an example of

A continuous variable _____ (does/does not)allow fractional amounts.A discrete variable _____ (does/does not)allow fractional amounts.

In an experiment,the researcher _____,in a correlational study,the researcher _____.

When a change in the values of one variable is accompanied by a consistent change in the values of another variable,we have what is known as a