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Twelve bank tellers were randomly sampled and it was determined that they made an average error of 3.6 errors per day with a sample standard deviation of 0.42 error. Construct a 90 percent confidence interval for the population mean of errors per day. What assumption is implied about the number of errors bank tellers make?
Simplify the arithmetic by first subtracting 80 points from each score to obtain a new sample of 2, 8, 2, and 6. Then, compute the mean and standard deviation for the new sample.
How many different participants dO you need for a completely independent groups assignment,- a completely repeated measures assignment.
Employee salaries. A group of high-technology companies agreed to share employee salary information in an effort to establish salary ranges for technical positions in research and development.
at a local middle school 60 of students are enrolled in choir or band. if a random sample of 5 students is taken what
exploratory data analysis.a. perform exploratory data analysis on all variables in the data set. realizing that you
question what is an example in the world around you for which you would use a chi-square analysis? be specific.
Suppose that the two components are placed in series and that as soon as a component fails, it is replaced by a new one. Let N(t) be the number of replacements in the interval (0,t]. We can show that the stochastic process
if np is greater than or equal to 15 and n1-p is greater than or equal to 15 what is the approximate shape of the
What are the checks on the powers of the judiciary? Are they potent and easily invoked, or weak and difficult to invoke?
In the spring of 2002, residents of the United States were quite worried about the possibility of further terrorists attacks. To gauge the public's sentiment on this topic, the Gallup Poll asked 1002 U.S.
Create simple indices for real exports and real imports with Quarter 1, 2007, used as the base period.
What are the minimum and the maximum starting salaries of the middle 95% of the LU graduates?
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