Respond to this Question
Similar Questions

math
If the true population standard deviation was known to be 3.0, then approximately what minimum sample size would you need in a simple random sample if you want a 95% confidence interval for the mean to have a margin of error of .5
asked by Marissa on April 14, 2011 
statistics
A sample of 40 observations is selected from one approximately normal population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second source. The sample mean is 99
asked by georgia on May 29, 2010 
statistics
A sample of 40 observations is selected from one approximately normal population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second source. The sample mean is 99
asked by K on May 22, 2010 
Stats
A simple random sample will be obtained from a normally distributed population. Find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 5% of the standard deviation. Is such a sample
asked by Lindsey on November 28, 2011 
Statistics
In an essay of 250500 words, thoroughly address the following items and respond to the related questions: 1.Define the term standard deviation. Why is it important to know the standard deviation for a given sample? What do
asked by Andrew on January 23, 2014 
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 
math
Can I gt some help on these questions! 1.Research subjects that are divided up based on gender, age, etc. to be compared to people of the same group is what type of design experiment? 2. A biologist collects a sample of 50 snakes.
asked by mysterychicken on June 20, 2013 
Math (Statistic)
Considered the sampling distribution of a sample mean obtained by random sampling from an infinite population. This population has a distribution that is highly skewed toward the larger values. a) How is the mean of the sampling
asked by Jennifer on February 19, 2007 
math
The standard deviation of a sample taken from population A is 17.6 for a sample of 25. The standard deviation of a sample taken from population B is 21.2 for a sample of 30. The standard deviation of the sample mean differences
asked by j on July 15, 2015 
statistics
You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 5 and a population standard deviation 1 and a sample size of 4. Machine 2 has a sample mean of 8 and a population
asked by Anonymous on October 11, 2010