Which could be used to evaluate the expression-6 ( 4 2/3

Approximately how many of the world’s volcanoes occur along the Ring of Fire? 60 to 70 percent 70 to 80 percent 80 to 90 percent

d1i1m1o1n [39]

Answer:

About 70 to 80%

Step-by-step explanation:

About 70 to 80% of the world total volcanoes occur along the fire ring, The ring of fire is present near the pacific ocean the countries like Chile ,Japan and the island which are present near the pacific ocean are come under the fire ring , the ring of fire is very active in nature this is the reason most of the volcanoes and earthquakes occur here

6 0

3 years ago

Look at screen shoot ! math btw again -_-

KIM [24]

Naeem is the correct answer

6 0

3 years ago

Read 2 more answers

The null and alternative hypotheses for a population proportion, as well as the sample results, are given. Use StatKey or other

zloy xaker [14]

Answer:

$z=\frac{0.38 -0.5}{\sqrt{\frac{0.5(1-0.5)}{100}}}=-2.4$

$p_v =P(z$

And we can use the following excel code to find it:

"=NORM.DIST(-2.4,0,1,TRUE)"

Step-by-step explanation:

Data given and notation

n=100 represent the random sample taken

$\hat p=0.38$ estimated proportion of interesst

$p_o=0.5$ is the value that we want to test

$\alpha$ represent the significance level

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the proportion is lower than 0.5:

Null hypothesis: $p \geq 0.5$

Alternative hypothesis: $p < 0.5$

When we conduct a proportion test we need to use the z statistic, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.38 -0.5}{\sqrt{\frac{0.5(1-0.5)}{100}}}=-2.4$

Statistical decision

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

The next step would be calculate the p value for this test.

Since is a left tailed test the p value would be:

$p_v =P(z$

And we can use the following excel code to find it:

"=NORM.DIST(-2.4,0,1,TRUE)"

4 0

3 years ago

Please help I’ll give you brainiest

chubhunter [2.5K]

B

Establish the equation of the line in slope-intercept form

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

to calculate m use the gradient formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁) = (- 3, - 3 ) and (x₂, y₂) = (3, - 1) ← 2 points on the line

m = $\frac{-1+3}{3+3}$ = $\frac{2}{6}$ = $\frac{1}{3}$

the y-intercept is (0 , - 2 ) ⇒ c = - 2

y = $\frac{1}{3}$ x - 2 ← equation of line

This is a strict inequality since the line is broken, hence

y > $\frac{1}{3}$ x - 2 → B

8 0

4 years ago

What is the value of x in the equation 1/5x - 2/3y = 30 , when y = 15

koban [17]

X is equivalent to 200. (credit to suspho)

6 0

3 years ago