Answer:
mean=13.2
median=13
mode=14
Step-by-step explanation:
mean=sum of values/number of values
sum of values=9+17+14+12+14+14+9+11+10+20+10+22+11+11+9+15+14+15=237
number of values=18
mean=237/18=13.17
Mean=13.2
Arranging data in ascending order
9 9 9 10 10 11 11 11 12 14 14 14 14 15 15 17 20 22
n/2=18/2=9 is an integer so,
median= the average of (n/2)th and (n/2 +1)th observation
median=(12+14)/2=26/2=13
Median=13
Mode= The most repeated observation in the data
14 is repeated more than other numbers so, 14 is the mode for this data.
Mode=14
