Random sample of average debt
A random sample of average debt (in dollars) at graduation from 30 of the top 100 public colleges and universities is listed below. Is there sufficient evidence at a=0.01 to conclude that the population mean debt at graduation is less than $18,000?
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The college store paid $1572 for the order of 46 calculators. Store paid $11 for each scientific calculator. Others, all graphing calculators, cost store $52 each. How many of each kind of calculator was ordered?
You wish to estimate the proportion of adults that have ever used alternative medicine. Obtain a sample size that will ensure a margin of error of at most 0.01 for a 95% confidence interval.
Suppose that area covered by radioactive substance is linear function of time t and is always circular in shape, state radius r (in km) of contamination as a function of t (in days).
Number of dimes is 3 time number of nickels and quarters together. If box has 29 dollars and 35 cents, determine number of nickels, dimes, and quarters that it has.
A random sample of average debt (in dollars) at graduation from 30 of the top 100 public colleges and universities is listed below. Is there sufficient evidence at a=0.01 to conclude that the population mean debt at graduation is less than $18,000
A random sample of 300 local wage as well as salary workers showed that 50 belonged to the union. At a=0.05, is there sufficient evidence to conclude that the proportion of union membership differs from 13.7%?
The Wi's aren't identically distributed (e.g., possible values of W2 are 2 and 0), so our Central Limit Theorem for identically distributed and independent variables can't be employed here when n is large.
A binary code (0,1) is transmitted along a noisy communication channel. In the absence of noise, relays A,B of the receiver are activated. If 0,1 are received respectively as a result of noise distortions, relay A may also be activated by a 1 and
Assume that the joint pdf of two continuous RVs X and Y is given by f(x,y) = kxy^2 if 0 less than or equal to x less than or equal to y less than or equal to 1 0 otherwise
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