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Satistics
Monthly incomes of employees at a particular company have a mean of $5954. The distribution of sample means for samples of size 70 is normal with a mean of $5954 and a standard deviation of $259. Suppose you take a sample of size
asked by Suzan on September 15, 2015 
Statistics
For two normal distributions with the same mean, but different standard deviations, the 95% confidence interval will be: (a) The same for both distributions (b) Larger for the distribution with the smaller standard deviation (c)
asked by Thano on October 28, 2007 
Algebra
A supervisor finds the mean number of miles that the employees in a 9the x has a line on top)department live from work. He finds X=2.9 and s=3. Which statement must be true? z376 is within 1 standard deviation of the mean. z37 is
asked by Junior on July 18, 2014 
Statistics Please Help
One reason for standardizing random variables is to measure variables with: A. dissimilar means and similar standard deviations in like terms B. different means and standard deviations on a nonstandard scale C. similar means and
asked by Austin on May 26, 2013 
Business Statistics
1. Suppose that the mean of the annual return for common stocks from 1950 to 2012 was 9.4%, and the standard deviation of the annual return was 17.5%. Suppose also that during the same 62year time span, the mean of the annual
asked by Michelle on March 6, 2013 
STAT
One of the conditions that allows us to use ANOVA safely is that of equal (population) standard deviations. Can we assume that this condition is met in this case? here are options (a) No, since the three sample standard deviations
asked by Anonymous on November 23, 2012 
STAT
One of the conditions that allows us to use ANOVA safely is that of equal (population) standard deviations. Can we assume that this condition is met in this case? here are options (a) No, since the three sample standard deviations
asked by Anonymous on November 23, 2012 
STAT
One of the conditions that allows us to use ANOVA safely is that of equal (population) standard deviations. Can we assume that this condition is met in this case? here are options (a) No, since the three sample standard deviations
asked by Anonymous on November 23, 2012 
DRWLS
the estimate and uncertainty for experiment 1 is .15+.01 and the .12+.01 for experiment 2. Is the discrepancy between these two data sets significant? Why? I would say yes, the discrepancy is probably significant, because the
asked by Tiffany on October 18, 2008 
Statistics
I am having trouble with the following problem: P(Z > +1.34) Would someone help me? If you've already normalized the number you're interested in, then look up in your tables (the normal distribution tables) to find 1.34 standard
asked by Wendy on October 19, 2006