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Rzqust [24]
2 years ago
10

What is the value of sp of the following set of data. X 1 2 9 Y 4 4 1

Mathematics
1 answer:
Dimas [21]2 years ago
3 0
SP is the sum of the product of deviations of x and y and is given by
\Sigma (x-\bar{x})(y-\bar{y})

Given the table below
x:     1   2   9
y:     4   4   1

The mean of x is given by (1 + 2 + 9) / 3 = 12 / 3 = 4
The mean of y is given by (4 + 4 + 1) / 3 = 9 / 3 = 3.

We find the SP using the table below.
\begin{center}
\begin{tabular}
{|c|c|c|c|c|}
x & y & $x-\bar{x}$ & $y-\bar{y}$ & ($x-\bar{x}$)($y-\bar{y}$)\\ [1ex]
1 & 4 & $1-4=-3$ & $4-3=1$ & $-3\times1=-3\\
2 & 4 & $2-4=-2$ & $4-3=1$ & $-2\times1=-2$\\
9 & 1 & $9-4=5$ & $1-3=-2$ & $5\times-2=-10\\[1ex]
 & & & & \Sigma (x-\bar{x})(y-\bar{y})=-15
\end{tabular}
\end{center}

Therefore, <span>the value of SP for the given set of data is -15.</span>
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Answer:

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Then the number of boulders in the really fountain should be the same as the number of boulders in the scale model of the fountain.

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stepladder [879]

Answer:

Answer;


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Step-by-step explanation:

Explanation;


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Find the annual rate of growth (interest rate) on an account that was worth $200 in 1975 and $415.79 in 1990
kodGreya [7K]

The percent change from one period to another is calculated from the formula:

<span><span> Where:<span>PR = Percent Rate
VPresent = Present or Future Value
VPast = Past or Present Value</span></span><span>The annual percentage growth rate is simply the percent growth divided by N, the number of years.</span>
(415.79-200)/200*100=107.89
The annual<span> percentage growth rate is simply the percent growth divided by N, the number of years.</span>
<span>
</span><span>107.89/15=7.193</span>

</span>
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What are the coordinates of vertex J of the pre-image?(14 POINTS. PLS HELP, GEOMETRY)
DaniilM [7]
If we look at where it is now, we would have multiplied the x and y values by 1/2. since we are working backwards, lets multiply by 2 instead...giving us the vertex for the pre-image....

J is now (0, -2)      multiply by 2
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Question 1 (1 point) The yearly interest payable on a deposit of $250 at 5.5% p.a. simple interest is: A $137.50 B $13.75 C $12.
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Answer:

B: $13.75

Step-by-step explanation:

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