Exam 1: Introduction and Mathematical Preliminaries

An experiment tested whether the context of the learning environment was important in memory recall.Sixteen people learned a list of 40 unrelated words either inside a room or outside of a house on a patio.Later they were asked to recall the words in either the same environment they learned the list of words in or the alternative environment.The number of correctly recalled words was measured. In this experiment,the number of correctly recalled words was

Distinguish between discrete and continuous variables.

Which of the following levels of measurement involves variables that are not qualitative?

A variable is a phenomenon that takes on different values,or levels.

(ÓX)² = 900

The use of random sampling procedures guarantees that a sample will be representative of the population.

Calculate the in which x is the number of words recalled 2,3,4.

A biased sample is one that will lead us to make erroneous statements about the population.

The number of hours per week that someone watches violent television programs is an example of a(n):

Distinguish between parameters and statistics.

Variables that can assume only a finite number of values or that have a finite number of values that can occur between any two points are called _____ variables.

List the five general activities that characterize scientific research.

Ordinal,interval,and ratio measures must occur on scales that are restricted to positive integers.

A clinical psychologist studying the effects of different therapies categorizes patients according to whether they are or are not in therapy.In this case,therapy is a:

Inferential statistics are used to describe a data set only.

If one is studying intelligence as a consequence of differing child-rearing practices,then the measure of intelligence is called _____.

On the basis of observing the population,the researcher makes generalizations to the sample.

If c is a constant having a value of five,then S(X - c)² for the scores 4,6,and 10 would be ____.

The number of people in your family is considered a _____ variable.

Statistic is to parameter as _____ is to _____.