Quantitative methods CRN:17725

15 credits

Unit convenor: Mike fletcher

Dates: 24 April 2007 – 12 June 2007

Assignment Requirements:

Students will be required to demonstrae a knowledge of experimental and correlational techniques.

Assignment submission date: 26 June 2007


[24 April 2007 – Session 1](Missed)


[01 May 2007 – Session 2]

  • Histogram
  • Survey:
  1. Block graph – qualitative variables
  2. Bar-line graph – discrete variables
  3. Histogram – continuous variables
  4. Pie chart – useful for showing proportions
  5. Box plot – useful for comparing two data sets
  6. Stem and leaf diagram – keeps all the original data

Box plot:

  • Displays the median, upper and lower qurtiles and the highest and lowest values.

e.g.: The test scores of 15 boys are: 12, 25, 34, 37, 46, 47, 56, 57, 61, 63, 67, 70, 75, 83.

  1. The median is 56
  2. The lower quartile is 37
  3. The uper quartile is 67

Box plot:

10 20 30 40 50 60 70 80 90
                 
                 
                 
                 

STEM and LEAF diagram:

STEM

LEAF    
10 2    
20 5    
30 4 7  
40 6 7  
50 1 6 7
60 1 3 7
70 0 5  
80 3    
  • Decide on the question you want the answer to
  • Collect the appropriate data
  • Display the data in an appropriate way
  • Calculate the appropriate statistics
  • If necessary, find the significance of the statistics

Next week:

  • Work with paper and pencil again, and the following week go to SPSS.