InterQuartile Mean IQM or Truncated Mean Concept with 4 Examples

#Boxandwhisker #statistics_GCSE #Ogive #CummulativeFrequency #Median #GroupData #Stat
Interquartile mean (IQM) is the mean of the middle 50 percent of data.
• Data divisible by 4 in a data set
• Data not divisible by 4 in a data set

Q1. Find IQM for the following data set.
1, 3, 4, 5, 5, 6, 7, 9, 10, 11, 11, 15
a. 6
b. 6.5
c. 7
d. 7.25

 
Q2. Find IQM for the following data set round to 3 significant places.
4, 5, 6, 8, 9, 11, 14, 16, 20
a. 9.00
b. 9.56
c. 9.65
d. 10.3

 
Q3. Find IQM for the following data set round to 3 significant places.
1, 3, 4, 5, 6, 6, 8, 9, 9, 10, 11, 11, 15, 16, 20
a. 8.93
b. 8.50
c. 8.40
d. 8.25

 
Q4. Find IQM for the following data set.
34, 62, 70, 75, 78, 84, 88, 90, 96
a. 77
b. 78
c. 79
d. 80 #GCSE #SAT #EQAO #IBSLmath