Which expression is equivalent to (3a)–2?
2 answers:
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To find the solution we will first find the difference between each number and mean, and then substitute the value in the formula of standard deviation.
The standard deviation is 8.4477 and the variance is 71.40.
Given to us
- Test scores of Adimas = (76, 87, 65, 88, 67, 84, 77, 82, 91, 85, 90)
- Mean = 81
difference between each number and mean,
= 25 + 36 + 256 + 49 + 196 + 9 + 16 + 1 + 100 +16 + 81
= 785
Variance =
= 71.40
Hence, the standard deviation is 8.4477 and the variance is 71.40.
Learn more about Standard Deviation:
Answer:
The balancing point is 23
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Step-by-step explanation:
Given
The above graph
Required
Determine the balancing point
This simply means that we calculate the mean.
From the above graph, we have:
So, the mean is:
<em>Hence, the balancing point is 23</em>