answer question a - b

1. Each child in a study of infantile autism was given a behavioural test and graded on a scale from follows. 20 (mild symptoms) to 37 (maximum severity). The scores of the children in the study were as Score Frequency 24 25 26 27 5 28 29 30 31 32 33 34 35 36 37 Use the data above to calculate the following measures of central tendency and measures of spread. a) Find the median, first quartile, and third quartile for this data. (3 marks) b) Determine the interquartile range. (1 mark