algebra 2

Students at a high school all took the same English test. The scores are approximately normally distributed with a mean of 77 and a standard deviation of 9. If 2500 students took the test, approximately how many scored above 86 or below 68%?

  1. 👍 0
  2. 👎 0
  3. 👁 89
asked by Lea
  1. you buy a video game system for $500. the value of the video game system system decreases 25% each year . write an exponential model for the value of the videogame system in terms of the yeArs since the purchase

    1. 👍 0
    2. 👎 0
    posted by tatianna

Respond to this Question

First Name

Your Response

Similar Questions

  1. statistics

    10th grade New York public school students taking a standardized English test produced test scores that were normally distributed with a mean of 85 and a standard deviation of 4. Let x be a random variable that represents the test

    asked by jill on December 4, 2016
  2. Psych

    If an iq test has high predictive validity, then a. a psychologist can accurately guess what score someone will get before he or she has started the test. b. students who get good score on the test will get even better scores if

    asked by Ashley on March 21, 2012
  3. Statistics

    A researcher is interested in whether students who attend private high schools have higher average SAT scores than students in the general population. A random sample of 90 students at a private high school is tested and has a

    asked by Tony on November 19, 2011
  4. statistics

    SAT Exam Scores – A school administrator wonders if students whose first language is not English score differently on the math portion of the SAT exam than students whose first language is English. The mean SAT math score of

    asked by Liz on October 7, 2011
  5. STATISTICS HELP PLEASE

    A total of 23 High School students were admitted to State University. Of those students, 7 were offered athletic scholarships. The school’s guidance counselor looked at their composite ACT scores (given in the table below),

    asked by jabrony on November 29, 2011
  6. statistics

    1. A researcher is interested in whether students who attend private high schools have higher average SAT Scores than students in the general population. A random sample of 90 students at a private high school is tested and and a

    asked by Carl on June 8, 2011
  7. Writing

    Writeacher,when is the best time for me to post this so that you are available? Prompt: New laws are being proposed that would require schools to accommodate students who wish to transfer to a different school if the school falls

    asked by Anonymous on August 4, 2013
  8. statistics

    In a psychology class of 100 students, test scores are normally distributed with a mean of 80 and a standard deviation of 5. Approximately what percentage of students have scores between 70 and 90? A. 68% B. 80% C. 95% D. 99%

    asked by StudentD on August 15, 2012
  9. Statistics

    The variance of the mathematical scores of a sample of 21 high school girls was found to be 100 and that of a sample of 25 high school boys was 169. Test the hypothesis that the scores of the high school boys are more varying that

    asked by Anonymous on January 27, 2014
  10. Statistics

    Scores on the 1995 SAT verbal aptitude test among Kentucky high school seniors were normally distributed with an average of 420 and the SD of 80. Scores on the 1995 SAT quantitative aptitude test among Kentucky high school seniors

    asked by Madison on October 25, 2016

More Similar Questions