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AfilCa [17]
3 years ago
6

What is the point-slope form if it's through (1,4) and the slope is -3

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
3 0

Answer:

y-4=-3(x-1)

Step-by-step explanation:

Point slope formula=

y-y_1=m(x-x_1)

Underscores mean subscript

plug in known values

y-4=-3(x-1)

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Starting salaries of 90 college graduates who have taken a statistics course have a mean of $43,993 and a standard deviation of
inysia [295]

Answer:

a) E = 2482.90

b) 99% Confidence interval: (41510.1,46475.9)

Step-by-step explanation:

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Sample mean, \bar{x} =$43,993

Sample size, n = 90

Alpha, α = 0.051

Sample standard deviation, s = $9,144

a) The margin of error

Formula:

z_{critical}\text{ at}~\alpha_{0.01} = 2.576

E =z_{critical}\times \displaystyle\frac{s}{\sqrt{n}}\\\\E = 2.576\times \frac{9144}{\sqrt{90}}\\\\E = 2482.90

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\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

43993 \pm 2482.90 = (41510.1,46475.9)

3 0
3 years ago
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