statistics

the admissions policy at a certain university requires that incoming students score in the upper 20% on a standardized test. if the mean score on the test is 510 and the standard deviation of the scores is 80, what is the minimum score that a student can earn on the test to meet the admissions requiremnt? Scores on the test are normally distributed and are reported in intervals of 10.

asked by Anonymous
  1. z = (score - mean)/ standard deviation

    1)Refer to the z-score chart. Look up the +z-score corresponding to a p-value of ~.8
    2)Find score and round up to the nearest 10 interval.

    posted by TutorCat
  2. 520

    posted by mad

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