dispersion

Question 1

are also known as measures of speed

Answer 1

variation or spread within a data set. This includes the
range and the standard deviation.

Question 2

range

Answer 2

difference between the highest and the lowest scores its highly effected by anomalies

Question 3

standard deviation

Answer 3

calculates two spread-out scores are from
greater accuracy
less affected by anomalies
if SD is greater than 1 then the data is to spread less significant

Question 4

SD

Answer 4

a calculation of the average difference between each score in a data set and the mean bigger values indicate greater variation

Question 4

distribution curve

Answer 4

1-bell shaped curve
2-mean mode and medium Are equal at the centre
3-syumrtical around the mean equal numbers of scores below and above the mean