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Goryan [66]
3 years ago
9

I need help on this math

Mathematics
2 answers:
-BARSIC- [3]3 years ago
7 0

Answer:

y = 2... Maybe

Step-by-step explanation:

both 7,2 and 2,12 have to in them but I am not that smart when it comes to explaining

Lena [83]3 years ago
5 0

Answer:

y = -2x + 16

Step-by-step explanation:

Slope:\frac{y^{2}-y^{1}  }{x^{2}-x^{1}  }=\frac{12-2}{2-7}=\frac{10}{-5}=-2

y-intercept:y-y_{1}=m(x-x_{1} ) \\y-2=-2(x-7)\\y-2=-2x+14\\

Add 2 to both sides;

y = -2x + 16

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A science teacher wrote the table of values below.
nirvana33 [79]

Answer:

B

Step-by-step explanation:

Took quiz

5 0
3 years ago
a previous analysis of paper boxes showed that the standard deviation of the length is 9mm. What is the 98% confidence interval
il63 [147K]
We cannot calculate the confidence interval without the sample size.  However, for the second question, the sample size needed would be 49.

The formula we use is

n=(\frac{z_{\frac{\alpha}{2}}\times \sigma}{E})^2

To find the z-score:
Convert 98% to a decimal:  0.98
Subtract from 1:  1-0.98 = 0.02
Divide by 2:  0.02/2 = 0.01
Subtract from 1:  1-0.01 = 0.99

Using a z-table (http://www.z-table.com) we see that this value is closest to a z-score of 2.33.

Using the z-score, our standard deviation (9) and our margin of error (3), we have:
n=(\frac{2.33(9)}{3})^2=(6.99)^2=48.86\approx 49
6 0
3 years ago
The independent-samples t testResearch Scenario: A forensic psychologist has developed a new program that teaches empathy and po
8_murik_8 [283]

Answer:

Step-by-step explanation:

Hello!

The researcher developed a treatment to teach social skills to youth offenders. To test if the treatment is effective in increasing empathy compared to the standard treatment she randomly selected a group of 9 offenders and applied the new treatment and to another group of 9 randomly selected youth offenders, she applied the standard treatment. (Note: the data corresponds to two samples of 9 units each, so I've used those sizes to conduct the test)

At the end of the treatment, she administers BES to measure their empathy levels. Her claim is that the offenders that received the new treatment will have higher BES scores than those who received the standard treatment.

1) Using the records obtained for both groups, she  intends to conduct an independent t-test to analyze her claim.

X₁: BES results of a youth offender treated with the new treatment.

X₂: BES results of a youth offender treated with the standard treatment.

H₀: μ₁ = μ₂

H₁: μ₁ ≠ μ₂

α:0.05

test statistic

t_{H_0}= -0.32

p-value: 0.7517

The p-value is greater than the significance level so the decision is to not reject the null hypothesis. This means that at a 5% significance level you can conclude that there is no difference between the mean BES scores of the youth offenders treated with the new treatment and the mean BES score of  the youth offenders treated with the standard treatment. The new treatment doesn't increase the levels of social empathy of the youth offenders.

I hope this helps

(Box plot in attachment)

7 0
3 years ago
Find the distance between the following points<br> R(-2, 3), S(3, 15)
aleksley [76]
Your answer will be: 13
5 0
3 years ago
" four multiplied by the sum of a number and three is sixteen"
tia_tia [17]
4(x+3) = 16
4x+12=16
4x=4
x=\frac{4}{4}
x=1
4 0
3 years ago
Read 2 more answers
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