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charle [14.2K]
3 years ago
15

We gave a national verbal proficiency test that has a mean score of 500 with a standard deviation of 75. What raw score would co

rrespond to the 60th percentile
Mathematics
1 answer:
charle [14.2K]3 years ago
4 0

Answer:

519

Step-by-step explanation:

Let's assume that the scores for the national verbal proficiency test follow a normal distribution.

Mean score (μ) = 500

Standard deviation (σ) = 75

According to a Z-score table, the score for the 60th percentile is roughly z = 0.253

For any score "x", the z-score is given by:

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

For z = 2.53:

0.253=\frac{X-500}{75}\\X=519

The raw score to the 60th percentile is 519.

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The parabola is swached vertically by a factor of 5.
kobusy [5.1K]

Answer:

answer below

Step-by-step explanation:

I think you mean "squashed" or "stretched" vertically by a factor of 5.

f(x) is the original parabola equation

g(x) = 5f(x) is vertically stretched by a factor of 5

(x,y) -> (x , 5y)

5 0
2 years ago
Hey again! back again with ratios
ozzi

Answer:

Two ratios equivalent to 27:9

A) 3:1

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If the circumference of a circle measures 8 pi cm, what is the area of the circle in terms of pi?
Effectus [21]

Answer:

803.84

Step-by-step explanation:

the formula for the area of a circle is A = π r2 which is pi times the radius squared.n in this case if the circumference is 8 cm then the radius would be half of the circumference which is 4. then you square 4 which is equal to 256. Then take 256 and multiply it by pi. 256 × 3.14 = 803.84. i hope this helped you.

8 0
3 years ago
in 2003 the population of an African country was about 19 million people, which is 1 million more than 4 times the population in
ELEN [110]

Answer:

I think the sudden increase in the population is because of encomic opportunity available in the region which was not available before and now there opportunity

5 0
3 years ago
The ability to find a job after graduation is very important to GSU students as it is to the students at most colleges and unive
sergejj [24]

Answer:

Step-by-step explanation:

Using the formula

p +/- z* √(p(1-p) / n)

Where p is sample proportion = 3226/3957 = 0.8153, n = 3957 and z* is 2.576

0.8153 + (2.576 √(0.8153(1-0.8153) / 3957))

0.8153 + (2.576 √ (0.8153(0.1847) /3957)

0.8513 + (2.576 √(0.1572/3957)

0.8513 + (2.576 √0.00003974)

0.8513 + 2.576(0.0063)

0.8513 + 0.016

0.8670 ~ 87%

For the lower interview

0.8513 - 0.016

= 0.8353 ~ 84%

Thus, at 99% confidence interval is 84% and 87%

7 0
3 years ago
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