statistics Urgent please!!!!!!!!!!!!!!!!!!!!!
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Math
I need help with this these two problem PLEASE!!! For a population with a mean of μ 80 and a standard deviation of 12, find the zscore corresponding to each of the following samples. a. M 83 for a sample of n 4 scores
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In this unit we have worked with scores and their locations within a distribution. This discussion is designed to get you to think a little more about distributions of scores. Shown below are two samples of scores. Input these
asked by john on February 26, 2012 
Statistics
For a population with a mean of (mew) = 50 and a standard deviation of 10, how much error, on average, would you expect between the sample mean (M) and the poulation mean for: a) a sample of n=4 scores b) a sample of n=16 scores
asked by Aestas on May 24, 2011 
Statistics
For a population with a mean of µ=60 and standard deviation of Ợ=24, find the z=score corresponding to each of the following samples a. M=63 for sample of n=16 scores b. M=63 for sample of n=36 scores c. M=63 for sample of n=64
asked by Lyndyc on December 13, 2013 
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for each of the following, assume the 2 samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the 2 sample means. a)each sample has n = 5 scores with s^2 =
asked by jerr ****** on April 14, 2011 
probability and statistics
a population forms a normal distribution with a mean of u=80 and a standard deviation of o=15. for each of the following samples, compute the zscore for the sample mean and determine whether the sample mean is a typical,
asked by darrell on January 6, 2012 
Statistic
For a population with a mean of μ 70 and a standard deviation of 20, how much error, on average, would you expect between the sample mean (M) and the population mean for each of the following sample sizes? a. n 4 scores
asked by Cookie on February 1, 2013 
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On average, a sample of n=100 scores will provide a better estimate of the population mean than would be obtained from a sample of n=50 scores. (True or False)
asked by Anonymous on July 5, 2011 
Statistics
Suppose that a sample of 50 scores has a mean of Y=90 and the standard deviation is 15. Between what two values of Y will at least 90% of the scores fall? What is the maximun number of scores that can lie out of the interval?
asked by Sara on October 30, 2011 
statistics
1) A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores below
asked by Mich on September 27, 2011 
statistics
A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores 1) Below
asked by Brady on September 30, 2011