measures of dispersion

Question 1

measures of dispersion

Answer 1

enable examination of the spread of scores within a set of data, measure the variability between values in a data set and how much the scores vary.

Question 2

range

Answer 2

the difference between the highest and lowest scores in a given set of data.

Question 3

strengths of range

Answer 3

quick and easy to calculate so can draw conclusions at a quicker rate.

Question 4

limitations of range

Answer 4

vulnerable to extreme scores so may not be representative of the data.

Question 5

standard deviation

Answer 5

tells how far, on average, scores are from the mean. A larger SD means the scores are more spread out meaning more variation in responses. A smaller SD means scores are less spread out showing less variation. If SD for both groups are similar, it means results are distributed in a similar way.

Question 6

strengths of SD

Answer 6

uses all of the data so is more representative.

Question 7

limitations of SD

Answer 7

only able to use when you have a mean