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Alex73 [517]
2 years ago
5

Which expression does the model represent?

Mathematics
2 answers:
mylen [45]2 years ago
8 0

Answer:

the anwser is a

stay poitive

Step-by-step explanation:

Fed [463]2 years ago
3 0

Answer:

a

Step-by-step explanation:

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What are the 10th and 90th percentiles of the distribution of sample proportion for the population proportion below?
levacccp [35]

Answer:

The 10th percentile is 0.0784.

The 90th percentile is 0.1616.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

For a proportion p in a sample of size n, we have that \mu = p, \sigma = \sqrt{\frac{p(1-p)}{n}}

In this problem, we have that:

\mu = 0.12, \sigma = \sqrt{\frac{0.12*0.88}{100}} = 0.0325

10th percentile:

X when Z has a pvalue of 0.1. So X when Z = -1.28.

Z = \frac{X - \mu}{\sigma}

-1.28 = \frac{X - 0.12}{0.0325}

X - 0.12 = -1.28*0.0325

X = 0.0784

The 10th percentile is 0.0784.

90th percentile:

X when Z has a pvalue of 0.9. So X when Z = 1.28.

Z = \frac{X - \mu}{\sigma}

1.28 = \frac{X - 0.12}{0.0325}

X - 0.12 = 1.28*0.0325

X = 0.1616

The 90th percentile is 0.1616.

4 0
3 years ago
Which expression represents the following algebraic statement?
Nat2105 [25]
The first one, 7x-2y
6 0
3 years ago
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HELP ME SUPPER FAST PLEASE​
kari74 [83]

Answer:

A) x<-1

Step-by-step explanation:

As the circle is not filled in, we know that the inequality must be > or <.

As the line is to the left of -1 (or lower than it). We know that x must be less than -1

8 0
3 years ago
What is -4y+7y²+7x-x+3y+x-4y
Zanzabum

Step-by-step explanation:

look at the pic................... hope it helps

4 0
2 years ago
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Hey guys, I need help with these questions. I need them done by today! Please, help :( There are 4 questions or more I think, I
Orlov [11]

Answer:

Step-by-step explanation:

Domain x^2 - 9 {Solution: - infinity < x < infinity}

Interval notation (- infinity, infinity)

Range of x^2 - 9 (Solution: f(x) is greater than or equal to - 9)

Interval notation (-9, infinity)

Axis interception points of x^2 - 9:

X- intercepts (3, 0) (-3, 0)

Y-intercepts (0, -9)

Vertex of x^2 - 9: Minimum (0, -9)

Solve for f:

f (x) = x^2 - 9

Step 1: Divide both sides by x.

fx / x = x^2 - 9 / x

f = x^2 - 9 / x

Answer:

f = x^2 - 9 / x

8 0
1 year ago
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