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According to the Labor Department, in 2004, 14% of architects and engineers were woman. Suppose a random sample of 50 architects and engineers is selected. How likely is it that the random sample contain five or fewer women in these positions.
A local politician in this town has stated that the average property taxes are $1800 and most people do not pay more than this amount. Conduct a test at the alpha = .01 level to determine if this is true. For this test, consider a sample size of 3..
The price of XYZ Corporation stock is normally distributed all through the year with mean of $42.00 per share and a standard deviation of $2.25 per share. Suppose that the stock is traded 240 days out of the year.
What is the chi-square goodness of a fit test? What is its purpose? What does it measure? Is there a way of telling when the test is over?
Heights of men on a baseball team has a bell-shape distribution with a means of 173 cm and a standard deviation of 9 cm. Using the empirical, rule what is the approximate percentage of the men between the following values?
A prison official wants to estimate the proportion of cases of recidivism. In examining 250 convicts there are 65 cases. with 99% confidence interval what is the range? How do you figure this type of problem?
In a standard normal dist. what is the prob. of getting a value less than 1.63? How about between 1.13 and 1.86? How about greater than .58?
Do you think it would be justified for people of certain racial or ethnic groups to be subject to additional security checks at airport check points?
In considering doing a logistic regression using the Enter method, it was suggested that I may want to consider doing a sequential LSR or stepwise logistic regression instead.
How variable is the number of service calls with which Sam's department must deal?
Suppose we compare two population means, μ 1 - μ 2 . In each case, indicate how μ 1 relates to μ 2 :
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience?
A Patent Medicine Company supervisor assumes that the bottling machine is operating properly if only 5 percent of the processed bottles are not full. A random sample of 100 bottles had 7 bottles that weren't full. Using a significance level of .01..
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