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3 years ago

PLEASEE HELP! I WILL MARK BRAINLIEST!

Mathematics

1 answer:

Artemon [7]3 years ago

6 0

<em>Answer: This is the only thing i can find online about your question.</em>

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Step-by-step explanation:

if it helps pls mark me brainliest.

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A 90 percent confidence interval for the slope of a regression line is determined to be (-0.181, 1.529). Which of the following

GenaCL600 [577]

Answer: a. The correlation coefficient of the data is positive.

Step-by-step explanation:

Estimated slope of sample regression line = $\dfrac{Upper \ limit + lower\ limit}{2}$

Here , confidence interval : (-0.181, 1.529)

Estimated slope of sample regression line = $\dfrac{-0.181+1.529}{2}$

$=\dfrac{1.348}{2}\\\\=0.674\ \ \ \ [\text{ positive}]$

⇒Correlation coefficient(r) must be positive, So a. is true.

But, d. and e. are wrong(0.674 ≠ 0 or 1.348).

We cannot check residuals or its sum from confidence interval of slope of a regression line, so b is wrong.

We cannot say that scatterplot is linear as we cannot determine it from interval, so c. is wrong

So, the correct option : a. The correlation coefficient of the data is positive.

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3 years ago

Which of the following statements is true ?

rusak2 [61]

both √25 and -√16 are rational

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3 years ago

What is the equation of the following line? Be sure to scroll down first to see

Gnom [1K]

Answer:

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (2, - 8) ← 2 points on the line

m = $\frac{-8-0}{2-0}$ = $\frac{-8}{2}$ = - 4

The line crosses the y- axis at (0, 0) ⇒ c = 0 , then

y = - 4x + c , that is

y = - 4x → A

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3 years ago

A student usually saves $20 a month. He would like to reach a goal of saving $350 in 12 months. The student writes the equation

ratelena [41]

Answer:

350=12x+240

12x=350-240=110

X=110 divide 12=answer

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Answer:

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