Hurry please! How many data points are plotted incorrectly on the scatter plot graph, if any?
1 answer:
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Where the variance is 0.32, the mean is 0.40, and there are provided sets of probabilities, the standard deviation will be 0.566.
<h3>What is standard deviation?</h3>The average degree of variability in your dataset is represented by the standard deviation. It reveals the average deviation of each statistic from the mean. In general, values with a high standard deviation are spread out from the mean, whereas those with a low standard deviation are grouped together close to the mean.
Here,
mean=0.4
variance=(Xn-mean)².P(x)n
=(0-0.4)²*(0.64)+(1-0.4)²*(0.32)+(2-0.4)²*0.04
variance=0.32
Standard deviation=√(variance)
=√0.32
=0.566
The standard deviation will be 0.566 where variance in 0.32 and mean is 0.40 and given sets of probability.
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His father's age is 44 years
Step-by-step explanation:
The given is:
- Bob’s age is 15 years less than half his father’s age
- In six years his father’s age will be eleven years more than triple Bob’s age
We need to find his father’s age now
Assume that the Father's age is x years
∵ The father's age is x years
∵ Bob’s age is 15 years less than half his father’s age
- That means multiply x by half and subtract 15 from it
∴ Bob's age = x - 15
In six years
The father's age = x + 6
The Bob's age = x - 15 + 6 =
x - 9
∵ In six years his father’s age will be eleven years more than
triple Bob’s age
- That means equate (x + 6) by 3 times Bob's age and add 11
to the product
∴ x + 6 = 3( x - 9) + 11
- Simplify the right hand side
∴ x + 6 = x - 27 + 11
- Add like terms in the right hand side
∴ x + 6 = x -16
- Subtract 6 from both sides
∴ x = x - 22
- Subtract x from both sides
∴ x = -22
- Divide both sides by
∴ x = 44
His father's age is 44 years
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