CH10 representing variation graphically Flashcards
1
Q
discontinuous variation
A
- a characteristic that can only result in certain values
2
Q
Continuous variation
A
- a characteristic that can take any value within a range
3
Q
Normal distribution curve
A
- occurs when continuous variation data are plotted onto a graph
4
Q
Characteristics of a normal distribution curve
A
- mean, median and mode are the same
- Curve has a bell shape
5
Q
Standard deviation
A
- a measure of how spread out the data is
- Greater standard deviation means greater spread of data
6
Q
Values within standard deviations of mean
A
- 68% in one
- 95% in two
- 99.7% in three
7
Q
Students t test
A
- used to compare the means of data values of two populations
8
Q
Spearman’s rank correlation coefficient
A
- used to consider relationship of two sets of data
