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Statistics
the scoring of IQ tests is designed so that the scores of the test taking population are normally distributed with a mean of 100 and a standard dev of 15. what percent of the population have an IQ less than 92? how do i figure
asked by Abigail on April 29, 2013 
Statistics
I have a question that involves explaining what is wrong in each of the following situations: (a) A random sample of size 20 is taken from a population that is assumed to have a standard deviation of 12. The standard deviation of
asked by Lynn on March 29, 2009 
sample size/ standard deviations
How do we compute sample size fluctuations? Suppose we have a population of 16000 and a sample size of 30, and the number of samples 1000, what will be the impact on population mean and standard deviation when the population is
asked by ut on December 1, 2011 
statistics
How do we compute sample size fluctuations? Suppose we have a population of 16000 and a sample size of 30, and the number of samples 1000, what will be the impact on population mean and standard deviation when the population is
asked by Nasir on December 1, 2011 
Stats
Suppose a Normal model describes the fuel efficiency of cars currently registered in your state. The mean is 27 mpg, with a standard deviation of 4 mpg. Describe the mileage of the most efficient 3% of all cars. a. greater than
asked by Ali on July 29, 2016 
statistics
Suppose a random sample of size 50 is selected from a population with σ = 10. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate). a. The
asked by Vanessa on April 15, 2014 
Statistics (39)
Suppose a random sample of size 40 is selected from a population with = 9. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate). a. The
asked by Mia on May 6, 2014 
Economics (39)
Suppose a random sample of size 40 is selected from a population with = 9. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate). a. The
asked by Mia on May 9, 2014 
statistics
Suppose a random sample of size 50 is selected from a population with σ = 10. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate). a. The
asked by Vanessa on April 14, 2014 
statistics
Consider the test of hypothesis for the equality of two population means. The sample data from the first population is: n = 10, xbar = 52.4, s = 5. The sample data from the second population is: n = 8, xbar = 48.2, s = 6. Both
asked by Anonymous on March 27, 2015