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Use the formula to find the standard error of the distribution of differences in sample means, x¯1-x¯2.
Samples of size 105 from Population 1 with mean 83 and standard deviation 10 and samples of size 90 from Population 2 with mean 78 and standard deviation 18
(Round your answer for the standard error to two decimal places.)
Standard error = ______
(the absolute tolerance is +/-0.01)
An article in the Davis (CA) Enterprise (5 April 1994) had the headline "Study: Fathers key to child's success." The article described a new study as follows.
Perform a sample t-test and get the p values on spss which comes under (repeated anova measures) and make a graph and a SD table also
When filter permits spam to slip through into your inbox, which type of error is that? Which type of error is it when the real message gets classified as junk?
A manufacturer of executive jet aircraft is concerned with its profit picture over the short run. It produces two different models of planes, x1 and x2. Its profits are $30,000 for each x1 and $20,000 for each x2. There are two major constraints o..
What are some statistical findings on effective school discipline procedures?
you want to compare years of schooling among american adults who describe their political veiwpoint as liberal moderate
It is believed that the population standard deviation for the length of online videos is 1.7 minutes. The website would like to set α =0.05. The critical value for this hypothesis test would be ________. Round to three decimal places.
Determine the coefficient of determination R 2 . Determine standard error of the estimate s e .
Paul received a score of 80 on a history test for which the class mean was 70 with a standard deviation of 10. He received a score of 75 on a biology test for which the class mean was 70
In 2011 Pew research asked a random sample of 799 U.S. teens about their internet use, and 49% of those teens reported that they had misrepresented their age online in order to gain access to websites or online services
a) What is the probability that a randomly selected resident has neither pet? b) What is the probability that a randomly selected resident has a cat
Again referring to the data in 'odometer' from AnzacG.xls and the population from which it is drawn, determine the sample size required to estimate the population mean to within 5,000 kms with 90% confidence. Again assume the population standard d..
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