* not completed

. What is the difference between interval/ratio and ordinal variables?

The distance between categories is equal across the range of interval/ratio data. correct incorrect

Ordinal data can be rank ordered, but interval/ratio data cannot. correct incorrect

Interval/ratio variables contain only two categories. correct incorrect

Ordinal variables have a fixed zero point, whereas interval/ratio variables do not. correct incorrect

* not completed

. What is the difference between a bar chart and a histogram?

Bar charts represent numbers, whereas histograms represent percentages. correct incorrect

A histogram does not show the entire range of scores in a distribution. correct incorrect

There are no gaps between the bars on a histogram. correct incorrect

Bar charts are circular, whereas histograms are square. correct incorrect

* not completed

. What does the term 'outlier' mean?

A score that is left out of the analysis because of missing data correct incorrect

The arithmetic mean correct incorrect

A type of variable that cannot be quantified correct incorrect

An extreme value at either end of a distribution correct incorrect

* not completed

. What is the function of a contingency table, in the context of bivariate analysis?

It shows the results you would expect to find by chance. correct incorrect

It summarizes the frequencies of two variables so that they can be compared. correct incorrect

It lists the different levels of p value for tests of significance. correct incorrect

It compares the results you might get from various statistical tests. correct incorrect

* not completed

. If there were a perfect positive correlation between two interval/ratio variables, the Pearson's r test would give a correlation coefficient of:

- 0.328 correct incorrect

+1 correct incorrect

+0.328 correct incorrect

- 1 correct incorrect

* not completed

. What is the name of the test that is used to assess the relationship between two ordinal variables?

Spearman's rho correct incorrect

Allergy correct incorrect

Cramer's V correct incorrect

Chi Square correct incorrect

* not completed

. When might it be appropriate to conduct a multivariate analysis test?

If the relationship between two variables might be spurious. correct incorrect

If there could be an intervening variable. correct incorrect

If a third variable might be moderating the relationship. correct incorrect

All of the above. correct incorrect

* not completed

. What is meant by a "spurious" relationship between two variables?

One that is so ridiculously illogical it cannot possibly be true. correct incorrect

An apparent relationship that is so curious it demands further attention. correct incorrect

A relationship that appears to be true because each variable is related to a third one. correct incorrect

One that produces a perfect negative correlation on a scatter diagram. correct incorrect

* not completed

. A test of statistical significance indicates how confident the researcher is about:

understanding the data set correct incorrect

passing a test about their significant other. correct incorrect

the inter-coder reliability of their structured interview schedule. correct incorrect

generalising their findings from the sample to the population. correct incorrect

* not completed

. Setting the p level at 0.01 increases the chances of making a:

Type I error correct incorrect

Type II error correct incorrect

Type III error correct incorrect

all of the above correct incorrect