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Statistics
Use a chisquared test to test the claim about the population variance or standard deviation at the given level of significance and using the given sample statistics. Claim: ơ2 ≤ 60; α = 0.025. Sample statistics: s2 = 72.7, n
asked by Brandon on December 27, 2007 
statistics
Given a sample size of 38, with sample mean 660.3 and sample standard deviation 95.9 we are to perform the following hypothesis test. Null Hypothesis H0: ƒÊ = 700 Alternative Hypothesis H0: ƒÊ ‚ 700 At significance level
asked by Scott on August 9, 2010 
Statistics
Scores on an IQ test are normally distributed. A sample of 15 IQ scores had standard deviation s=10. The developer of the test claims that the population standard deviation is =15. Do these data provide sufficient evidence to
asked by steph on March 12, 2019 
Math146
You wish to test the following claim (Ha) at a significance level of α=0.001. Ho:μ=69.1 Ha:μ
asked by Lisa on August 7, 2018 
Statistics
This is the first question..... For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size (b) 3. This is the second question....For each of the following
asked by Heather on May 3, 2011 
statistics
it is stated that the standard deviation sample of the is 7.6 (n = 26). Test the claim to a significance level of 0.10 that the population standard deviation was greater than 7.0. Round all answers to 3 decimal places.
asked by geety on July 28, 2012 
statistics
it is stated that the standard deviation sample of the is 7.6 (n = 26). Test the claim to a significance level of 0.10 that the population standard deviation was greater than 7.0. Round all answers to 3 decimal places.
asked by geety on July 28, 2012 
statistics
Prep Courses? Scores for men (nationwide) on the verbal portion of the SAT test are normally distributed with a mean of 509 and a standard deviation of 112. Randomly selected men are given the Columbia review course before taking
asked by STatistic on June 28, 2010 
Statistic
For 3 and 4 find the range, variance, and standard deviation. Round to the nearest tenth. 3. Twelve students were given an arithmetic test and the times (in minutes) to complete it were 10, 9, 12, 11, 8, 15, 9, 7, 8, 6, 12, 10 4.
asked by Artmisha on May 30, 2014 
MTH233/statistics UOP
A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon. You believe the claim is incorrect and find that a random sample of five cars has a mean gas mileage of 19 miles per gallon and a
asked by sue on July 27, 2010