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
aliina [53]
2 years ago
14

The scores on an achievement test are normaly distributed with mean µ = 100 and standard deviation σ = 100. What should the scor

e of a student be to place him or her among the top 10% of all students who tool the test?
Mathematics
1 answer:
ser-zykov [4K]2 years ago
7 0

Answer:

the student should score atleast 229 to be among the top 10%.

Step-by-step explanation:

in terms of the normal distribution, and if the table that you're using calculates the area of the normal distribution from the mean to a point x, only then what we are actually finding the value 'x' at which the z-score is at 40% (the rest 50% is already skipped by the table)

P(0.4) = \dfrac{x - \mu}{\sigma}

after finding the the value at this z-score, we can find the value of x at which the score is in the top 10% range.

we can find the z-score either using a normal distribution table or calculator. (but be sure what area is it calculating)

looking at the table the closest value we can find is, 0.4015 at z = 1.29 ((it is above 40% because we want to be in the top 10% range)

P(0.4015) = \dfrac{x - 100}{100}

1.29 = \dfrac{x - 100}{100}

x = 1.29(100) + 100

x = 229

the student should score atleast 229 to be among the top 10%.

You might be interested in
When evaluating (6x+9)^2 - 5 for x = 1, the given value of 1 is substituted for what part of the expression?
Naya [18.7K]
The correct answer would be C. The variable
5 0
3 years ago
Read 2 more answers
Please help.. I’m stuck on this question
s2008m [1.1K]

Answer: The answer is 1

Step-by-step explanation: The distance between -7 and -3 is 4 then half the distance in between -7 and -3 is going to be -5 because we just clarified that the distance between -7 and -3 is 4 so we did 4/2 and got 2 so we can figure out whats the distance between each point. Now that we figured that out we can determine what value the blue dot is if the value between each point is 2 then we can make out what the rest of the points on the line. If we from -3 to the blue point that would be 1.

4 0
3 years ago
Pls help me I really need help on this
Svetlanka [38]

Answer:

c

Step-by-step explanation:

i just took the test

7 0
3 years ago
How many cubic inches are in an aluminum can with a 3 1/2 in diameter and 2 2/5 in height
Hatshy [7]

Answer:

Step-by-step explanation:

Idk tbh

5 0
3 years ago
Read 2 more answers
The Kyoto Protocol was signed in 1997, and required countries to start reducing their carbon emissions. The protocol became enfo
Fynjy0 [20]

Answer:

Step-by-step explanation: Type 1 error is the error of rejecting a true null hypothesis or giving a false positive conclusion while type 11 error is the non rejection of a false null hypothesis.

The type 1 error for this question is: The mean CO2 is lower in 2010 than in 2004. While the type 11 error is:The mean C02 is higher in 2010 than In 2004. The consequences of making a type 1 error is that it will lead to a misguided information, while the consequences of making a type 11 error is that it could lead to loss of lives . The appropriate alpha level to use is 0.01, the reason is because the level of confidence needs to be high when it comes to health issues.

6 0
3 years ago
Other questions:
  • Bryan is setting charis in rows for graduation ceremony he has 50 black chars,and 60 white charis each row will have the same nu
    12·2 answers
  • A currency exchange will convert 1
    12·1 answer
  • Can someone send me the Proportional Relationships Flocabulary AK?
    8·1 answer
  • Need help with b and c
    10·2 answers
  • How many whole sandwiches can be made with 2 pounds of cheese if each sandwich has 3 ounces of cheese on it?
    14·1 answer
  • 340 pages; 20% decrease=? (With work plz)
    7·1 answer
  • PLZZZ HELP ME!!! AND QUICK!!!
    10·2 answers
  • Write a relate substraction fact 6+8=14
    5·2 answers
  • Please answer this. i really need help
    10·1 answer
  • I need this know please i will give brainliest
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!