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
Zinaida [17]
3 years ago
12

It is generally believed that nearsightedness affects about 1212​% of children in a certain region. A school district tests the

vision of 160160 incoming kindergarten children. How many would be expected to be​ nearsighted? What is the standard deviation for the number of nearsighted children in this​ group?
Mathematics
1 answer:
Mnenie [13.5K]3 years ago
5 0

Answer:

Step-by-step explanation:

Total number of kindergarten children in that region that were tested is 160

It is generally believed that nearsightedness affects about 12% of children in a certain region. Therefore,

The expected number of kindergarten children expected to be​ nearsighted is

12/100 × 160 = 19

Probability of success, p = 0.12

Probability of failure, q = 1 - p = 1 - 0.12 = 0.88

Standard deviation = √npq = √(160 × 0.12 × 0.88) = 4.11

You might be interested in
If complex number z = 3 Left-bracket cosine (StartFraction 3 pi Over 2 EndFraction) + I sine (StartFraction 3 pi Over 2 EndFract
larisa [96]

Answer:

81 4

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Please help. I just am I bit confused..
8_murik_8 [283]

Answer:

add tjem all up and fid the outnumber one

Step-by-step explanation:

8 0
3 years ago
Who can solve this and send me how they did it please ?!! I’ll mark brainliest
mariarad [96]

Answer:

232.57

A=7

4a2cot(180°

7)=7

4·82·cot(180°

7)≈232.5704

4 0
3 years ago
one bouquet of flowers has 3 roses for every 5 carnations. other bouquet has 4 carnations for every 5 daisies. if both bouquets
Leno4ka [110]

Answer:

therefore the second bouquet will have more flowers , as it will have 25 daisies

Step-by-step explanation:

3 roses for every 5 carnations

5 daisies for every 4 carnations

we can solve this using cross multiplication

3 : 5

x : 20

5x = 60

x = 60/5

<em>x = 12</em>

meaning that for a bouquet that has 20 carnations there will be 12 roses

5 : 4

x : 20

4x = 100

<em>x = 25</em>

meaning that for a bouquet that has 20 carnations there will be 25 daisies.

<u>therefore the second bouquet will have more flowers , as it will have 25 daisies</u>

6 0
3 years ago
Evaluate the expression below at x = 5. x/35 + 5x^2
kramer

Answer:

876/7

Step-by-step explanation:

Just plug the number 5 into the equation and solve. Remember your Order of Operations (PEMDAS).

4 0
2 years ago
Other questions:
  • Write an inequality that represents the situation below.
    9·1 answer
  • Which relation represents a function?
    8·2 answers
  • An asteroid is a celestial body. A large number of asteroids form a doughnut-shaped ring in space called the main asteroid belt.
    11·1 answer
  • The following table shows the distance from Tessa's house to her favorite locations.
    12·1 answer
  • What is 2+2 I have no idea please help
    12·2 answers
  • Please help! what is the value of x when f(x)=8? The graph shows the function f(x)=2^x
    8·1 answer
  • Miss Van invested some money by using the app e-trade. She tracks her
    15·1 answer
  • А
    8·1 answer
  • Problem 10 / (Second Session 2006)
    15·1 answer
  • What is the fractional value of A?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!