Answer: A. 6.5
Step-by-step explanation:
Here, the given set = { 15, 19 3, 12, 17, 2, 2, 8}
Mean, 
Number of elements, n = 8

Thus, the standard deviation, 
⇒ Option A is correct.
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p.s have a good day/night
Less than 1ounce: Feather, grain of sand, grain of sugar
more than 1 ton: Car,house,train
Answer:
-12a2 + 9a - 5
Step-by-step explanation:
the 2 should be small