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posted by PsyDAG
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SAT math scores approx. follow a normal distribution, with mean 500 and standard deviation 100. What % of students should have an SAT math score above 500? I think I use mean (500) + zscore * SD (100), but I do not know how to
asked by CM on September 28, 2009 
Statistics
Scores on the SAT form a normal distribution with u=500 and o=100. a. You are trying to qualify for a scholarship and find out that you need to have a higher score than at least 75% of the students. What score will you need? b.
asked by Amaya on December 14, 2015 
statistics/please check calculations
questions reads as follows: sat scores around the nation tends to have a mean score around 500, a standard deviation of 100 points and are approximately normal distribution. a person who scores 600 on the sat has approximately
asked by mary on October 16, 2010 
statistics
(population) A normal distribution has a mean of 80 and a std dev of 20. For each of the following scores, indicate wheter the tail of the distribution is located to the right or left of the score, and find the proportion of the
asked by Shane on February 7, 2008 
statistics
sat scores around the nation tend to have a mean score of about 500, a standard deviation of 100 points and are approximately normal distribution. a person who score 600 on the sat has approximately what percentile rank within the
asked by mary on October 16, 2010 
Math
Suppose that scores on the Math SAT exam follow a Normal distribution with mean 500 and standard deviation 100. Two students that have taken the exam are selected at random. What is the probability that the sum of their scores
asked by Loraine on June 28, 2015 
stats
scores on the SAT critical reading test in 2013 follow a normal distribution with a mean score of 496 and a standard deviation of 115. what proportion of scores are higher thzn 530? what proportin of scores are between 400 and
asked by breana on January 31, 2017 
statistics
sat scores around the nation tend to have a mean score around 500, a standard deviation of about 100 points and are approximately normal distribution. a person who scores 600 on the sat has approximately what percentile rank
asked by please help in panic modemary on October 15, 2010 
statistics
every year thousands of students take the SAT'S. Recent trends show that the scores on the verbal section follow an approx. normal distribution with mean of 350 and stand. deviation of 110 A)a student is chosen at random. it is
asked by todd on February 10, 2008 
Statisitcs
How do I find the value of the mean, when I am only given the std dev of a normal distribution and a percentage of values greater than another value.
asked by A. on April 14, 2016