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Computing probability values using normal distribution:
The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model. Assume the assembly times follow the normal distribution.
a. Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
b. What percent of the garages take between 29 hours and 34 hours to erect?
c. What percent of the garages take 28.7 hours or less to erect?
d. Of the garages, 5 percent take how many hours or more to erect?
We code middle-aged Americans as 1 and senior citizens as 0, the logistic regression model for senior citizens
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries.
Write the regression equation approximately. Computed the coefficient of determination(r 2 ).
Which of the following is the appropriate conclusion from carrying out these multiple comparisons
A journal polled its readers to determine the proportion of wives who, if given a second chance, would marry their husband again.
Find the expected GPA when SAT = 800. Find E (GPA|SAT = 1,400). Comment on the difference.
For the 20 test scores shown, find the percentile rank for a score of 86.
Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
The results of the simple linear regression are provided below.
A company makes camshafts. The camshaft lengths need to be within a certain tolerance or they will not fit. They have produced x bar and s charts
Find the probability of failure of system for any 4 hours of operation?
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