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Compute a 99% confidence interval for μ if the average for randomly selected 20 heat pumps is 4.85 and the standard deviation of all heat pumps is known to be 0.75.
Also, how large a sample size is necessary to estimate true mean μ to within 0.2 with 99% confidence?
a spymaster has a network of 7 operatives whom he pays out of a slush fund containing 20000. for accounting reasons his
A school tracks the absences of pupils as part of a flu surveillance system. Regular reporting of absences among 25 students in grade 1 are taken, and based on these data, the long-run proportion of absences under normal conditions is estimated to..
Show that if the roots of the polynomial p are all real, then the roots of p' are all real. If, in addition, the roots of p are all simple, then the roots of p' are all simple.
What steps is the U.S. government taking to reduce transportation security risks related to global trade?
the support for a vibrating sorter consists of a plate sitting on a helical spring with a central plunger through the
- in an emergency room at a hospital on average 4.5 patients that are seen on any given day are admitted to the
1. For ?xed B such that P(B) > 0, show that P(·|B) satis?es the axioms of probability.
Briefly describe co relational research. Name a variable from this study and one from the workplace that might prove to provide a co relational relationship
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation
A real estate agent wants to compare the variation in the selling price of homes on the oceanfront with those 3 blocks away A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling prices was 45,600.
You need to estimate the mean Christmas sales across a large chain of jewelry stores. You want to estimate this mean value to within $100 with 99% confidence
Plot the power function of this testing procedure. Interpret the implications of the power function from the standpoint of both the department store and the television manufacturer.
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