1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lorasvet [3.4K]
3 years ago
14

Glaucoma is a disease of the eye that is manifested by high intraocular pressure. The distribution of intraocular pressure in th

e general population is approximately normal with mean 16 mm Hg and standard deviation 3 mm Hg.
(a) What percentage of people have an intraocular pressure lower than 12 mm Hg?
(b) Fill in the blank. Approximately 80% of adults in the general population have an intraocular pressure that is greater than ________ (how many?) mm Hg.
Mathematics
1 answer:
lana [24]3 years ago
8 0

Answer:

(a) 9.18% of people have an intraocular pressure lower than 12 mm Hg.

(b) 80% of adults in the general population have an intraocular pressure that is greater than 13.47 mm Hg.

Step-by-step explanation:

We are given that the distribution of intraocular pressure in the general population is approximately normal with mean 16 mm Hg and standard deviation 3 mm Hg.

Let X = <u><em>intraocular pressure in the general population</em></u>

So, X ~ Normal(\mu=16,\sigma^{2} = 3^{2})

The z score probability distribution for normal distribution is given by;

                             Z  =  \frac{ X-\mu}{\sigma } }  ~ N(0,1)

where, \mu = population mean = 16 mm Hg

           \sigma = standard deviation = 3 mm Hg

(a) Percentage of people have an intraocular pressure lower than 12 mm Hg is given by = P(X < 12 mm Hg)

       P(X < 12) = P( \frac{ X-\mu}{\sigma } } < \frac{ 12-16}{3 } } ) = P(Z < -1.33) = 1 - P(Z \leq 1.33)

                                                   = 1 - 0.9082 = <u>0.0918</u> or 9.18%

The above probability is calculated by looking at the value of x = 1.33 in the z table which has an area of 0.9082.

(b) We have to find that 80% of adults in the general population have an intraocular pressure that is greater than how many mm Hg, that means;

        P(X > x) = 0.80      {where x is the required intraocular pressure}

        P( \frac{ X-\mu}{\sigma } } > \frac{ x-16}{3 } } ) = 0.80

        P(Z > \frac{ x-16}{3 } } ) = 0.80

Now, in the z table the critical value of z which represents the top 80% of the area is given as -0.842, that is;

                           \frac{ x-16}{3 } } = -0.842

                           x -16 = -0.842 \times 3

                           x = 16 - 2.53 = <u>13.47</u> mm Hg

Therefore, 80% of adults in the general population have an intraocular pressure that is greater than 13.47 mm Hg.

You might be interested in
Write an equivalent expression for 27x + 18.
Ugo [173]

Answer:

<u><em>9 (3x+2)</em></u>

Step-by-step explanation:

<u>27x + 18 = 9 (3x+2)</u>

<em>By simplifying the Given expression you get 9 (3x+2) </em>

<em>and no matter how many times you simplify that expression you always get the expression you started with so in other word their equavalent to each other</em>

<em />

<u><em>Hope this helps</em></u>

3 0
3 years ago
Which expression is equivalent to<br> (X^1/4 y^16)^1/2?
lawyer [7]

Answer:

x^{\frac{1}{8} } y^{8}

Step-by-step explanation:

Given :

(x^\frac{1}{4}  y^{16} )^{1/2}

Now,

(x^\frac{1}{4}  y^{16} )^{1/2}\\x^{\frac{1}{8} } y^{8}

Therefore, expression is equivalent to x^{\frac{1}{8} } y^{8}

3 0
3 years ago
Use the substitution method
vitfil [10]

Answer:

z = 9

z = 2

z = 5

z = 8

z = 11

Step-by-step explanation:

5 0
3 years ago
A ball dropped from the top of a building can be modeled by the function
timama [110]

A ball dropped from the top of the building can be modeled by the function f(t)=-16t^2 + 36 , where t represents time in seconds after the ball was dropped. A bee's flight can be modeled by the function, g(t)=3t+4, where t represents time in seconds after the bee starts the flight.

4 0
3 years ago
3. What are the next three terms of the sequence. 6, 12, 18, 24, ...?
Wewaii [24]

Answer:

O 30, 36, 42

Step-by-step explanation:

6 = 1 × 6, 12 = 2 × 6, 18 = 3 × 6, 24 = 4 × 6, ? = 5 × 6 = <u>30</u>, ? = 6 × 6 = <u>36</u>, ? = 7 × 6 = <u>42</u>

6 0
3 years ago
Other questions:
  • Please help I need to turn this in right now
    11·1 answer
  • Determine whether each relation is a function. Explain as well please.
    7·1 answer
  • On the map of a town, the library is located at (–8, 8), and the seafood market is located at (–8, 2). Mary walks from the libra
    11·2 answers
  • A theater has 30 seats in the first row. Each row behind the first row
    14·2 answers
  • An isosceles triangle has a base of 8 inches and legs measuring 12 inches how wide is the base of a similar triangle with legs m
    13·1 answer
  • Will mark brainliest
    11·2 answers
  • Which of the following numerical expressions results in a negative number?
    5·1 answer
  • Lo ran 6 ¼ miles Thelma ran 1 2/3 miles.<br> How many times further did Lo run than Thelma?
    11·1 answer
  • the area of square Garden is 625 metre square find its length its perimeter and find the cost of fencing it with 5 round at Rs 2
    10·1 answer
  • G(x) = x^2 log2x<br> ?<br> ?<br> ?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!