Question 1
Question
A researcher is interested in the eating behaviour of 5 year olds and selects a group to be tested in a research study. The group of 25 five year olds is a:
Answer

Sample

Statistic

Population

Parameter
Question 2
Question
A researcher is curious about the average IQ of registered voters in the state of Florida. The entire group of registered voters in Florida is an example of a:
Answer

Sample

Statistic

Population

Parameter
Question 3
Question
Although research questions typically concern a ______ research study typically examines a ______.
Answer

Sample, population

Statistic, sample

Population, sample

Parameter, Population
Question 4
Question
Statistical methods that use samples to answer general questions bout a population are called _______.
Answer

Parameters

Statistics

Descriptive statistics

Inferential statistics
Question 5
Question
Statistical techniques that summarise, organise and simplify data are classified as ________.
Answer

Population statistics

Sample statistics

Descriptive statistics

Inferential statistics
Question 6
Question
In an experiment, the researcher manipulates the _______ variable and measures changes in the ________ variable.
Answer

Population, sample

Sample, population

Independent, dependent

Dependent, independent
Question 7
Question
A researcher observed that preschool children playing in a red room showed more aggression than playing in a blue room. For this study, what is the independent variable?
Answer

Preschool children

Colour of the room

Amount of aggression

The children's play
Question 8
Question
In a study evaluating the effectiveness of a new medication designed to control high blood pressure, one sample of individuals is given the medicine and a second sample is given an inactive placebo. Blood pressure is measured for each individual. For this study, what is the dependent variable?
Question 9
Question
A hypothesis test is ______.
Answer

A descriptive technique that allows researchers to describe a sample

A descriptive technique that allows researchers to describe a population

An inferential technique that uses the data from a sample to draw inferences about a population

An inferential technique that uses information about a population to make predictions about a sample
Question 10
Question
The null hypothesis _______.
Answer

States that the treatment has no effect

Is denoted by the symbol H1

Is always stated in terms of sample statistics

All of the choices are correct
Question 11
Question
The null hypothesis ______.
Answer

Concerns a population with an unknown mean

Is denoted by the symbol H0

Generally states that there is no effect, no change or no difference

All of the other choices are correct
Question 12
Question
The final step of hypothesis testing is to ______.
Answer

Locate the values associated with the critical region

Make a statistical decision about H0

Collect the sample data and compute the test statistic

State the hypotheses and select an alpha level