Inferential statistics quiz Flashcards
Select one option from the list below which is a correct statement.
Select one:
A.
Inferential statistics tell you something about the influence of systematic variability.
B.
A type 1 error is a mistake in setting up the statistical hypotheses.
C.
The Mann-Whitney U test can be performed on ratio data.
D.
Ratio data is the only requirement for a t test.
E.
Statistical significance implies that the alternative hypothesis has been rejected.
The Mann-Whitney U test can be performed on ratio data.
The data are ratio, the distribution is normal and each of the 10 subjects took part in both parts of the experiment.
Select ONE option from those below, which indicates the most appropriate inferential test for the information given above.
Select one:
A.
Unrelated t test
B.
Wilcoxon Signed rank test
C.
Related t test
D.
Mann-Whitney U test
E.
Related Z test
C. Related t test
On a statistics examination 20 males and 30 females scored above the mean and 40 males and 10 females scored below the mean.
Select ONE option from the list below, which indicates the most appropriate hypothesis test for the information given above.
Select one:
A.
Related Z test
B.
Wilcoxon Signed rank test
C.
Mann-Whitney U test
D.
Unrelated Z test
E.
Chi squared test
E. Chi squared test
Ten radiologists and ten radiographers take part in a study to explore whether there is any difference in patient radiation dose for each group. A measurement of central tendency and spread is taken for each group. A normal distribution may be assumed.
Select one:
A.
Unrelated t test.
B.
Mann-Whitney U test
C.
Unrelated Z test
D.
Related t test
E.
Wilcoxon Signed rank test
Unrelated t test.
Select one correct response from the list below:
Select one:
A.
A quasi-experimental design has all the features of an experimental design.
B.
Surveys cannot involve both qualitative and quantitative methods of data collection.
C.
Analytical surveys commonly investigate cause and effect.
D.
Non-experimental research is only associated with qualitative data collection.
E.
A correlation design would look for the strength of a relationship between variables.
E A correlation design would look for the strength of a relationship between variables.
The data are interval, the distribution is normal and each of the 10 subjects took part in both parts of the experiment.
Select ONE option from the list below, which indicates the most appropriate hypothesis test.
Select one:
A.
Chi squared test
B.
Wilcoxon Signed rank test
C.
Related Z test
D.
Related t test
E.
Mann-Whitney U test
D.
Related t test
Part of the data from a study shows that 60 students who were classified as good attendees were academically classified as above average. 10 students classified as poor attendees were academically classified as below average.
Select ONE option from the list below, which indicates the most appropriate hypothesis test based on the information given above.
Select one:
A.
Related z test
B.
Unrelated Z test.
C.
Chi squared test
D.
Mann-Whitney U test
E.
Wilcoxon Signed rank test
Chi squared test
this is nominal data, we have categories of above and below average, good and poor attendees. This data could only be presented in a table, you could not plot a distribution.
A group of therapy radiographers are each given a clinical score on a clinical assessment for a certain technique. A training programme is given on the same technique and the clinical assessment repeated after two weeks.
Select ONE option from the list below, which indicates the most appropriate hypothesis test for the information provided above.
Select one:
A.
Mann-Whitney U test
B.
Related t test
C.
Related Z test
D.
Wilcoxon Signed rank test
E.
Chi squared test
Wilcoxon Signed rank test
Because the data is ordinal and the design is related.
Inferential statistical tests are undertaken to draw a conclusion about the sample.
Select one:
True
False
False
We use inferential tests to decide whether we can ‘infer’ something we find out about the sample back to the population. The tests are carried out to allow us to draw a conclusion / conclusions about the population.
The answer is false as inferential tests are used to draw a conclusion about the population not the sample.
Statistical significance implies that the null hypothesis has been rejected.
Select one:
True
False
True
Statistically the alternative hypothesis reflects the research hypothesis.
Select one:
True
False
True
The researchers theory is the initial research hypothesis. When using hypothesis testing this becomes the alternative hypothesis.
An inferential test is done to prove a hypothesis.
Select one:
True
False
False
We never prove a hypothesis. We decide whether to retain or reject the null hypothesis.
The Mann-Whitney test cannot be done on ratio data.
Select one:
True
False
False
An inferential test will indicate the degree of probability of random variability influencing the sample findings.
Select one:
True
False
True
