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Under what conditions is it appropriate to use the normal approximation to the binomial distribution in constructing the confidence interval for the population proportion?
under what circumstances should you use a grouped frequency distribution instead of a regular frequency
Teach for America - Several programs attempt to address the shortage of qualified teachers by placing uncertified instructors in schools with acute needs-often inner cities. A 1999-2000 study compared students taught by certified teachers with oth..
It is well known that similarity in attitudes, beliefs, and interests plays an important role in interpersonal attraction (see Byrne, 1971, for example). Thus, correlations for attitudes between married couples should be strong. Suppose a researcher ..
1. Let Yi and Yn be, respectively, the first and nth order statistics of a random sample of size n from a distribution of the continuous type having distribution function }{x). Find the smallest value of n such that Pr [}{Yn) - F(..
For the last 18 review periods the average sales figure has dropped to $11,500 with a standard deviation of $4,000. Management is concerned. Perform a hypothesis test to determine if this change in sales is a potential problem.
defects in computer hard-drives will usually render the entire computer worthless. for a particular model the percent
The U.S. trade deficit with Canada (billions of dollars) from 2000 through 2007 is reported as shown in the table. Using exponential smoothing and the smoothing constant a = 0.7, what deficit would have been forecast for 2008? Source: World Almanac..
the specifications on an electronic component in a target acquisition system are that its life must be between 5000 -
the time to failure of an electrical component in constant failure rate mode follows an exponential distribution with
A company produces calculators in batches of 64. Four out of every 100 calculators are defective. State the random variable for this situation and list its values.
Because of the difficulty of weighing a bear in the woods, researchers caught and measured 54 bears, recording their weight, neck size, length, and sex. They hoped to find a way to estimate weight from the other, more easily determined quantities.
if fxy x y ky ? x is a joint density function over the triangular region with vertices at 00 01 and 11 then what is
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