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bezimeni [28]
3 years ago
6

Please help desperate trying to solve

Mathematics
2 answers:
nata0808 [166]3 years ago
8 0
The sequence needs to be rearranged so the negative numbers come before the positive. The correct sequence would be:
-9, -2, 0, 1, 3, 5
Andrew [12]3 years ago
7 0
You have to put the negatives first, because they are lower than the positives. All the student did was put them from least to greatest, and ignored the negatives, basically. This is correct: -9,-2, 0, 1, 3, and five
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Step-by-step explanation:

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Write a linear function f with f(−9)=10 and f(−1)=−2
pashok25 [27]

First we need to find the slope of the function

The slope of a function is equal to

\frac{f(x_2)-f(x_1)}{x_2-x_1}

So now we plug this into the equation and find the slope (M will represent the slope)

m=\frac{10--2}{-9--1}\\m=\frac{12}{-8}\\m=-\frac{3}{2}

So the slope is -3/2


Now we can use point-slope form.

Point slope form is represented by

Y-Y_1=m(X-X_1)

So when we plug in our values we get

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So the equation is

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1) Find the 95 % confidence interval for the mean if σ = 11 , using this sample:
melamori03 [73]

Answer:

The 95 % confidence interval for the mean is between 28.09 and 35.97.

Step-by-step explanation:

Mean of the sample:

30 values.

So we sum all the values and divide by 30.

The sum of all the values(43 + 52 + 18 + ... + 20 + 41) is 961.

961/30 = 32.03

Confidence interval:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96\frac{11}{30} = 3.94

The lower end of the interval is the sample mean subtracted by M. So it is 32.03 - 3.94 = 28.09

The upper end of the interval is the sample mean added to M. So it is 32.03 + 3.94 = 35.97

The 95 % confidence interval for the mean is between 28.09 and 35.97.

8 0
3 years ago
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