Algebra

I do not understand this homework at all. Any help or elaboration would be greatly appreciated. Thanks.

100 juniors at Southwest High took the SAT test. The scores were distributed normally with a mean of 22 and a standard deviation of 3. Label the mean and three standard deviations from the mean.

a) What percentage of scores are between 22 and 25?
b) What percentage of scores are between scores 16 and 28?
c) What percentage of scores is less than a score of 13?
d) What percentage of scores is greater than 25?
e) Approximately how many juniors scored higher than 22?
f) Approximately how many juniors scored between 19 and 25?

  1. 👍 0
  2. 👎 0
  3. 👁 336
  1. you can get an idea of how these things work here:

    http://davidmlane.com/hyperstat/z_table.html

    try using your numbers, and you will see shaded areas.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    What would be the whole name of 2-butene and hydroiodic acid. Or the diagram. h h Any help would be greatly appreciated.

  2. Algebra 2

    To solve 49(3x) = 343(2x+1), write each side of the equation in terms of base what? . In the brackets are powers. I tried to solve this but I don't understand I believe it is the first base you go off from but I'm not sure what

  3. Calculus

    If f(x) is differentiable for the closed interval [−1, 4] such that f(−1) = −3 and f(4) = 12, then there exists a value c, −1< c < 4 such that a)f'(c)=3 b)f'(c)=0 C)f(c)=-15 d)f(c)=3 I understand that you are supposed to

  4. Taxtation

    Another client, Ms. Dunham, has asked you to help her understand how her tax is computed. You need to provide Ms. Dunham with the following: An example of how to calculate the tax liability using the tax rate table and the tax

  1. History

    I need some help on this essay question for my history class. I'm confused. There are three instances of the theory of the Manifest Destiny in the US as we approach 1845. Name the three examples, discuss each of one and it's

  2. Math

    I posted this problem the other day and someone answered it but when I checked my book I realized that I wrote the problem wrong. This morning when I posted I had put the wrong answer. The answer is suppose to be 1/8 but I don't

  3. AP Bio

    Hi I am stumped on an ap bio homework question: In the cyclic reaction sequence called the krebs cycle, which chemical event does not take place? a.The acetyl group is joined with a four carbon molecule, oxaloacetate. b. Two

  4. Chemistry

    Hi, I am doing a practice test for my chemistry final and I do not understand one of the answer they gave for this thermochemical equation question. I do not understand how they got 400kJ. The question is: Butane has a deltaH of

  1. Algebra

    S is the set of real numbers that are less than 15 A) 0 < s < 15 B) {s/s < 15} C) {s/s

  2. Math

    If a graph of a quadratic function can have 0, 1 or 2 x-intercepts. How can you predict the number of x-intercepts without drawing the graph or (completely) solving the related equation? Suppose that the graph of f(x) = ax^2+bx+c

  3. Evolutionary Bio

    How would you differentiate a monophyletic from a polyphyletic and paraphyletic? I know the definition but can someone provide me with an exmaple and an explanation for it so I can understand better? That would be greatly

  4. Biochemistry

    What type of interaction would most likely form in a tertiary structure of a protein? Lysine Tyrosine Asparagine Leucine Glutamic Acid Threonine Isoleucine Methionine I don't understand this at all. Much help is greatly

You can view more similar questions or ask a new question.