please answer both pls...... it's very urgent.... please help me
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1. mean = sum of all observation /total no. of observation = 1.2+1.9+1.8+1.1/4= 6/4=1.5
2. total no of observation(n) is 6(even)
median = (n/2)th observation +(n/2+1)th observation /2
=6/2 th observation +(6/2+1) th observation /2
= 3th observation +4th observation /2
=19+22/2
= 41/2
=20.5
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