Descriptive statistics quiz Flashcards
Student Radiographers are being assessed on two clinical skills whilst on placement. For each skill a senior radiographer awards a mark on a scale with a range of 1-10. See example below.
Student Skill 1 Skill 2
1 3 6
2 4 6
3 5 7
4 3 4
5 4 4
The total number of students taking part is 50. A normal distribution cannot be assumed.
Select ONE option from the list below which describes the measurement used for the resulting data.
Select one:
A.
Subjective measurement on a ratio scale.
B.
Subjective measurement on an ordinal scale.
C.
Subjective measurement on an interval scale.
D.
Objective measurement on an ordinal scale
E.
Objective measurement on a ratio scale.
B.
Subjective measurement on an ordinal scale.
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 option from the list below which describes the measurement used for the resulting data.
Select one:
A.
Subjective measurement on a ratio scale.
B.
Objective measurement on an ordinal scale.
C.
Subjective measurement on an ordinal scale.
D.
Objective measurement on a ratio scale.
E.
Subjective measurement on an interval scale.
Objective measurement on a ratio scale.
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 option from the list below which describes an appropriate measure of central tendancy and spread.
Select one:
A.
The median and standard deviation.
B.
The mode and standard deviation.
C.
The mean and interquartile range.
D.
The mean and standard deviation.
E.
The median and interquartile range.
The mean and standard deviation.
Student Radiographers are being assessed on two clinical skills whilst on placement. For each skill a senior radiographer awards a mark on a scale with a range of 1-10. See example below.
Student Skill 1 Skill 2
1 3 6
2 4 6
3 5 7
4 3 4
5 4 4
The total number of students taking part is 50. A normal distribution cannot be assumed.
Select one option from the list below which describes an appropriate measure of central tendency and spread.
Select one:
A.
The mode and standard deviation.
B.
The mean and interquartile range.
C.
The mean and standard deviation.
D.
The median and standard deviation.
E.
The median and interquartile range.
The median and interquartile range.
The weight of 100 patients was recorded for analysis.
Select ONE option from the list below which describes the measurement used for the data.
Select one:
A.
Objective measurement on an ordinal scale.
B.
Subjective measurement on an ordinal scale.
C.
Subjective measurement on a ratio scale.
D.
Objective measurement on a ratio scale.
E.
Subjective measurement on an interval scale.
Objective measurement on a ratio scale.
68% of the data points in a normal distribution lie between one standard deviation either side of the mean.
Select one:
True
False
True
The median value is preferred to the mean value when data are highly skewed because
the median always divides the data equally whereas the mean does not.
Select one:
True
False
True
Select one correct response from the following options which all relate to correlation.
Select one:
A.
A zero coefficient would indicate that data points are tightly packed around a trend line.
B.
0.5 is twice as strong as 0.25
C.
The values of both variables decrease in a negative coefficient.
D.
The values of both variables increase in a positive coefficient.
E.
+0.8 is stronger than -0.8
The values of both variables increase in a positive coefficient.
A zero coefficient indicates no relationship at all so data points would be expected to be scattered randomly. true or false
true A zero coefficient indicates no relationship at all so data points would be expected to be scattered randomly.
