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ozzi
3 years ago
15

Plz help!............

Mathematics
2 answers:
prisoha [69]3 years ago
7 0

Answer:

C

Step-by-step explanation:

B/c 0 is included in the range since it the origin of the graph and it then goes to negative infinity. This is why y has to be less than equal to 0 which means 0 is included and graph goes to negative infinity.

ANEK [815]3 years ago
5 0

Answer:

c

Step-by-step explanation:

c

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Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.
blsea [12.9K]

Answer:

a) Percentage of students scored below 300 is 1.79%.

b) Score puts someone in the 90th percentile is 638.

Step-by-step explanation:

Given : Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.

(a) If the average test score is 510 with a standard deviation of 100 points.

To find : What percentage of students scored below 300 ?

Solution :

Mean \mu=510,

Standard deviation \sigma=100

Sample mean x=300

Percentage of students scored below 300 is given by,

P(Z\leq \frac{x-\mu}{\sigma})\times 100

=P(Z\leq \frac{300-510}{100})\times 100

=P(Z\leq \frac{-210}{100})\times 100

=P(Z\leq-2.1)\times 100

=0.0179\times 100

=1.79\%

Percentage of students scored below 300 is 1.79%.

(b) What score puts someone in the 90th percentile?

90th percentile is such that,

P(x\leq t)=0.90

Now, P(\frac{x-\mu}{\sigma} < \frac{t-\mu}{\sigma})=0.90

P(Z< \frac{t-\mu}{\sigma})=0.90

\frac{t-\mu}{\sigma}=1.28

\frac{t-510}{100}=1.28

t-510=128

t=128+510

t=638

Score puts someone in the 90th percentile is 638.

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3 years ago
Which diagram shows the medians of a triangle? triangle 1 triangle 2 triangle 3 triangle 4
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Answer————————-triangle 3
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4 0
3 years ago
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Llana [10]

Answer: C

Step-by-step explanation: thats just what i think the answer is

3 0
2 years ago
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dedylja [7]
The answer is the first choice!!
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3 years ago
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Help me asap .no links! imma fail please help​
Dovator [93]
Bear with my working out lol,

8x3 = 24in^2
9x12 = 108in^2
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3 years ago
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