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Statistics
The following is a histogram (right skewed) of the first ten terms of a geometric distribution with p = .4. The mean of this distribution is 2.5 and the standard deviation is approximately 1.93. What's the shape of the
asked by Jim on February 18, 2016 
statistics
what are the mean and standard deviation of a sampling distribution consisting of samples of size 16? these sameples were drawn from a population whose mean is 25 and who standard deviation is 5. a. 25 and 1.25 b. 5 and 5 c. 25
asked by helga on February 1, 2009 
Statistics
A sample of 12 measurements has a mean of 24 and a standard deviation of 4.5. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 24 each. Find the standard
asked by Nao on January 24, 2009 
Statistics
If the standard deviation of a sample is 4.3 for 28 data values, what would the standard deviation be fore the population from which the sample was drawn?
asked by Leisa on January 30, 2013 
Statistics
A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term average daily sales were $24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of
asked by Matt on May 9, 2012

Math
1. An assembly line produces widgets with a mean weight of 10 and a standard deviation of 0.200. A new process supposedly will produce widgets with the same mean and a smaller standard deviation. A sample of 20 widgets produced by
asked by Mohan Sai on December 4, 2015 
statistics
An SRS of size n is taken from a large population whose distribution of income is extremely rightskewed and the mean income is calculated. Which of the following statements is false? a) When n > 30, the sampling distribution of
asked by Anna on April 17, 2012 
statistics
population has mean 53 and standard deviation 12. Calculate the standard deviation of x bar for a random sample of size 12.
asked by Bridget on August 18, 2014 
statistics
A student was asked to compute the mean and standard deviation for the following sample of n _ 5 scores: 81, 87, 89, 86, and 87. To simplify the arithmetic, the student first subtracted 80 points from each score to obtain a new
asked by Liz on June 22, 2011 
statistics
A researcher administered a treatment to a sample of participants selected from a population of 80. If the researcher obtains a sample mean of M=88. Which combination of factors is most likely to result in rejecting the null
asked by Robbie on November 9, 2012 
Math HELP!!!!!
The mean score on the exit examination for an urban high school is 63 with a standard deviation of 9. What is the standard deviation of the distribution of sample means with a sample size of 9? A. 2 B. 3 C. 4 D. 4.1 answer B
asked by angela on May 5, 2016
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