Exam 1: Introduction and Mathematical Preliminaries

ÓX = 12

One procedure for approximating representative samples is through:

A parameter is based on a sample of the population.

If you were interested in studying the effects of varying preparatory instructions on the perception of pain during an injection,the instructions would be a(n)_____ variable and the amount of perceived pain would be a(n)____ variable.

A phenomenon that takes on different values is termed _____.

The real limits of 1.672 are ____.

Taking measurements on a sample and then,from the observations,inferring something about a population is known as _____:

An example of a continuous variable is:

Use the table below solve the equations a-f. a.SX= b.(SY)²= c.SY X d.SY= e.SY²= f.(SY)(SX)=

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

A measure has as its referent:

A given probability must always range from 0 to 1.00.

In a truly random sample from the population

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

A psychologist records how many words subjects recall from a list under 3 different conditions: large reward for each word recalled,small reward or no reward. a.What is the independent Variable? b.Dependent Variable? c.What type of scale of measurement is being used to measure the dependent Variable?

Dr.Johns is studying the effects of caffeine on memory.After comparing the subjects taking a placebo with those taking caffeine pills he concludes that caffeine enhances memory.He most likely used _____ to determine the difference between groups.

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

If three people are described to you as short,average,or tall,then the level of measurement would be ____.

Describe the four types of measurement typically used in the behavioral sciences.

A researcher studies the relationship between the amount of time spent studying for an exam and the number of errors made.A sample of twenty students who have the same GPA are randomly assigned to one of four groups: 1,2,3,or 4 hours of study time.After studying the specified time,all students took an identical exam and the number of errors each student made was counted. Which of the following variables was held constant in the study?