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?
Answer
The medication
The placebo
Blood pressure
The individuals given the medication
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