What is the idea of statistical inference referred to in this chapter?

	a)	Observing the way a population will respond and therefore drawing general assumptions regarding individuals based upon the performance of the population as a whole.
	b)	Drawing a sample of participants and exploring their behaviour, generalising from their properties to the broader population.
	c)	Conducting a population census.
	d)	Making the statement that the results of a particular experiment only apply to the sample tested and should not be generalised to the population as a whole.
Correct! For more information on this topic see p.106, 6.2. Sorry that answer is incorrect, please try again. See p.106, 6.2 for more information. Your answer has been saved.

What is a probability distribution?

	a)	The distribution of values on a particular variable.
	b)	A distribution of scores that assumes many different shapes.
	c)	A distribution that describes how human samples and populations vary on specific characteristics.
	d)	All of the above.
Correct! For more information on this topic see p.107, 6.2.1. Sorry that answer is incorrect, please try again. See p.107, 6.2.1 for more information. Your answer has been saved.

With regard to sampling distributions, which of the following statements is true?

	a)	Sampling distributions are useful because they allow us to make assumptions concerning the extent to which the true population will fall within the margin of error of the estimate we make from the sample.
	b)	Sampling distributions do not tell us much more than the nature of the sample we have selected.
	c)	It is impossible to generalise from a sample of participants as they can never truly reflect the nature of the population.
	d)	Small random samples are preferable to larger samples as they are more manageable.
Correct! For more information on this topic see p.108 6.2.1. Sorry that answer is incorrect, please try again. See p.108 6.2.1 for more information. Your answer has been saved.

What is the main property of a normal distribution?

	a)	The normal distribution is defined by two parameters: mean and standard deviation.
	b)	Sixty-eight percent of all its observations fall within plus or minus 1 standard deviations from the mean.
	c)	A range of plus or minus 1.96 standard deviations covers 95% of the scores.
	d)	All of the above.
Correct! For more information on this topic see p.108 6.2.2. Sorry that answer is incorrect, please try again. See p.108 6.2.2 for more information. Your answer has been saved.

Which of the following statements is false?

	a)	The normal distribution of a variable in the population indicates that the sampling distribution of the mean is also normal.
	b)	The central limit theorem tells us that when the distribution of a variable is not normal, when the sample size increases, the sampling distribution of the mean becomes normal.
	c)	If we draw repeated random samples from the population and estimate the mean, the mean of these estimates of the mean will not equal the population mean.
	d)	The standard error is calculated by dividing the sample standard deviation by the square root of the sample size.
Correct! For more information on this topic see p.110 6.2.3. Sorry that answer is incorrect, please try again. See p.110 6.2.3 for more information. Your answer has been saved.

We often make inferences from our samples to the population characteristics, what is the rule that generally allows us to make this inference with confidence?

	a)	Our sample has been randomly drawn.
	b)	The sample size is large enough.
	c)	The characteristic of our inference has been validly measured.
	d)	All of the above.
Correct! For more information on this topic see p.111 6.2.3.Sorry that answer is incorrect, please try again. See p.111 6.2.3 for more information.Your answer has been saved.

Nonresponse is an important aspect of research that to some extent invalidates our assumptions outlined in section 6.2. How does this occur?

	a)	Where no contact is made with the individual throughout the duration of the fieldwork.
	b)	When the selected participant refuses to participate.
	c)	When a participant fails to complete all the items of a questionnaire.
	d)	All of the above.
Correct! For more information on this topic see p 112. Sorry that answer is incorrect, please try again. See p.112 for more information. Your answer has been saved.