statistics

posted by .

In a normal distribution with mu = 25 and sigma = 3, what number corresponds to z = -3?
is it 16, 18, or 20

  • statistics -

    Formula:

    z = (x - mean)/sd

    Plug in the numbers you know from the problem:

    -3 = (x - 25)/3

    Solve for x.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Statistics

    Is a sampling distribution always the same as the curve for a null hypothesis?
  2. Statistics

    I have a problem I need some help on. I have answered parts. Any guidance would be appreciated. K For many years the numbers of accidents per week at a hazardous intersection have been studied. The number of accidents per week varies …
  3. Statistics

    The probability distribution function for a normal distribution is f(x) = 1/(σ*sqrt(2*π))*e^[-(x-μ)^2/(2*σ^2)] How do I derive this?
  4. Statistics

    1. Which of the following statements are correct?
  5. statistics

    Which of the following statements are correct?
  6. statistics

    Which of the following statements are correct?
  7. Statistics

    Which of the following statements are correct?
  8. statistics

    which of the following statements are correct?
  9. statistics

    Five independent samples, each of size n, are to be drawn from a normal distribution where sigma is known. For each sample, the interval (y-bar - 0.96 * sigma/sqrt(n), y-bar + 1.06 *sigma/sqrt(n)) will be constructed. What is the probability …
  10. statistics

    Suppose X has a mound-shaped distribution with sigma=9. A random sample of size 36 has a sample mean 20. Is it appropriate to use a normal distribution to compute a confidence interval for the population mean u?

More Similar Questions