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statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 689599.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of
asked by Ab on July 13, 2010 
Math
Q1. A population has a mean of µ = 80 with σ = 20. a. If a single score is randomly selected from this population, how much distance, on average, should you find between the score and the population mean? 20 because the standard
asked by Jamie on May 27, 2014 
math
a sample consists of the following n =6 scores: 2, 7, 4, 6, 4, and 7 compute the mean and standard deviation for the sample
asked by Bridget on February 16, 2015 
statistics
In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in the intelligence scores for males than for females. Following are hypothetical data, similar to the
asked by Liz on June 22, 2011 
statistics
A researcher is testing the hypothesis that consuming a sports drink during exercise improves endurance. A sample of n=50 male college students is obtained and each student is given a series of three endurance tasks and asked to
asked by Melissa Williams on March 18, 2011

Psychology
Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows. Person Dexterity Anxiety 1 1 10 2 1 8 3 2 4 4 4 2 (c)
asked by summer on September 19, 2011 
university of phoenix
4.Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. Do not use webcalculator to answer the following questions. Instead,
asked by shirley on November 29, 2011 
stat.
A sample consists of the following n 6 scores: 2, 7, 4, 6, 4, and 7. a. Compute the mean and standard deviation for the sample. b. Find the zscore for each score in the sample. c. Transform the original sample into a new sample
asked by Nickie on January 27, 2013 
Statistics
A researcher measures the following scores for a group of people. The X variable is the number of errors on a math test, and the Y variable is the person’s level of satisfaction with his/her performance. (a) With such ratio
asked by J.T on October 13, 2014 
statistics
A sample from a population with = 40 and = 10 has a mean of M = 44. If the sample mean corresponds to a z = 2.00, then how many scores are in the sample? a. n = 100 b. n = 25 c. n = 5 d. n = 4
asked by Lyndyc on January 8, 2014 
Statistics
A sample of 12 measurements has a mean of 37 and a standard deviation of 4.25. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 37 each. A. Find the mean of
asked by Anonymous on September 4, 2014
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