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The Zinger is a modern sports car with an epoxy body. The manufacturer constructs Zinger bodies under pressure in a mold, and must wait a certain length of time to be sure that enough resin bonding and hardening have occurred before removing the body from the mold. Chemical engineers have found that the hardening time in normally distributed with mean 28.7 hours and standard deviation 6.4 hours. What is the minimal length of time the body should stay in the mold if the manufacturer wants to be 85% sure that the bonds have hardened?
It is interested in estimating a 99.97% worst case for percentage of loan that defaults on the portfolio. Show how this varies with the copula correlation.
When using the normal distribution (empirical rule) to obtain the bounds for 99.73 percent of the value in a population, the interval generally will be ______the interval obtained for the same percentage if Chebyshev's theorem is assumed., shorter..
Does the evidence suggest that postpartum women do not get enough sleep? Use =0.05 level of significance. How is the problem set up using the classical and P-value approach?
Using the method outlined in Brase and Brase, do the data indicate that the age group over 50 has a lower rate of hay fever?
Determine the point estimate and 95% confidence interval for the mean family dental expenses of all employees of the company.
Calculate the mean, mode and median of the grouped data derived from the frequency distribution above. Compare the results obtained from
A sample of 40 ovservations is selected from one population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observers is selected from a second population.
Generate three random observations from the uniform distribution between -10 and 40 by using the following random numbers:
Suppose you conduct survey asking people if they support something or if they like some product or if they watch some TV-show.
If we decrease the level of significance a (alpha) from 0.05 to 0.01, that means we are: More willing to accept a type II error;
The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that the randomly selected unit from a recently manufactured batch weighs no more than 3.50 ounces.
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.
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