statistics

posted by .

Scores on an english test are normally distributed with a mean of 33.6 and a standard deviation of 8.3. Find the 41st percentile?

  • statistics -

    Go to the Z tables for standard normal distrobution and find the normalized value for 0.41. You have to interpralte because the closest value is between -0.22 and -0.23. So Z=approx-0.225. From here you can solve for x using algebra. (x-33.6)/8.3=-0.225. Therefore x=(-0.225*8.3)+33.6=31.7325

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. statistics

    Section 5.3: Normal Distributions: Finding Values Answer the questions about the specified normal distribution. Q1: The lifetime of ZZZ batteries are normally distributed with a mean of 265 hours and a standard deviation รณ of 10 hours. …
  2. statistics

    Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 25. Use the 68-95-99.7 rule to find the following quantities. The percentage of scores less than 80 is?
  3. statistics

    Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6. What is the percentile rank of a score of 89?
  4. Analytical Skills

    If your score on a statistics exam was 76 and the professor gave you the distribution for the exam score for your class, you could find your percentile to understand where you stand in comparison to your fellow students. Assume that …
  5. Statistics

    Scores on the Stanford-Binet Intelligence scale have a mean of 100 and a standard deviation of 16, and are presumed to be normally distributed. A person who scores 68 on this scale has what percentile rank within the population?
  6. statistics

    Scores on an English test are Normally distributed with a mean of 78% and a standard deviation of 4.5%. Find the Value of the first quartile.
  7. stats.

    The GMAT test is required for admission to most graduate programs in business. In a recent year, the GMAT test scores were normally distributed with a mean of 550 and standard deviation of 100. A. Find the first quartile for the distribution …
  8. statistics

    Answer the following. Show your work to get credit. Exam scores are normally distributed with a mean of 81 and a standard deviation of 9. a) What is the minimum score one must have to be in the top 4% of the students taking the exam?
  9. Math Statistics

    Answer the following. Show your work to get credit. Exam scores are normally distributed with a mean of 81 and a standard deviation of 9. a) What is the minimum score one must have to be in the top 4% of the students taking the exam?
  10. Elementary statistics

    Scores on an English test are normally distributed with a mean of 78% and a standard deviation of 4.5%. Find the value of the first quartile.

More Similar Questions