The mean of first 12 observations is 28.5.if 1.5 is added to every observation. What is the new mean
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Answer:
30
Step-by-step explanation:
Total value of 12 observations is 342 and we gotta add 1.5 to every observations so 1.5 is added 12 times so 1.5*12=18 and sum of 342 and 18 is
360 divide it by 12 and answer is 30
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