Soci 203

In a normal distribution with a mean of 30, what percentage of the scores would be above the mean

50

a statistics class has 60% females and 40% males. A researcher selects a sample having 80% males and 20% females. Why should the researcher be cautious of making inferences about the entire class based on the sample?

Because the sample appears to be unrepresentative of the population

Which graphing techniques are appropriate for interval and ratio data?

Histograms and frequency polygons

A graph of a frequency distribution shows the frequencies on the

Y axis

In statistics a sample is

a subset of a group to which a law is applied

Suppose you are interested in how participants perform under different temperature conditions. You select 30 participants and assign them to work in on 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 research is an example of

an experimental study

A specific amount or category of the independent variable creating the specific situation under which the participants scores on some other variable are measure is called a

condition

Simone observed a group of adults at the local shopping mall. She recorded the length of time (in minutes) they stayed and the number of purchases they made, and then analyzed her data to see if there was a relationship between these two variables. What type of study is this called?

correlational study

In a/an __________, the experimenter measures scores on two variables. In a/an _______, the experimenter manipulates or changes one variable and measures scores on the other.

correlational study; experiment

If i want to summarize the characteristics of my statistics class to my friend, i should use

descriptive statistics

a representative sample is one

having characteristics accurately reflecting the characteristics of the population

The very first step when examining date is to

identify the shape of the distribution

The variable systematically changed or manipulated by a researcher in an experiment is called the

independent variable

In order to make statements about the population from information obtained from a sample, we must use

inferential statistics

Which of the following orders lists the scales of measurement from the scale providing the lease specific information to the scale providing the most specific information?

nominal, ordinal, interval, ratio

In statistics a symmetrical, bell-shaped polygon is called a

normal curve

In statistical notation, f stands for the

number of times a given score occurs in a sample

the individuals measured in sample are called the

participants

Numbers obtained from a sample are known as

statistics

In statistics a population is

the entire group to which a law of nature applies

In statistical notation, N stands for the

total number of scores in a data set

In research, the aspects of the situation or behavior we measure are called

variables