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A chemical company has three plants. Due to a shortage of labor and the intense heat involved in production, only one plant is operated at a time, and operations are shifted every few days to another plant. The company wants to estimate the relationship between daily production Y and the independent variable, labor force present X1. Since the company knows that differnces may exist among the different plants, it proposes a qualitative variable X2 also be used. The variable is defined as X2=1 if plant A is used, 2 if plant B is used, and 3 if plant C is used during the day.
a. Would you use this regression model? Why or Why not?
b. Please write the regression model that you would use and write descriptions for all variables and coefficients.
A sample of scores on an examination given to both males and females is: At the .01 level of significance, is the mean grade of the female students higher than that of the males?
Scientists have predicted that an increase in sea level is one of the likely consequences of climate change associated with the enhanced greenhouse effect
The diameters of peaches in a certain orchard are normally distributed with a mean of 3.85 inches and a standard deviation of 0.42 inches. Show all work.
What is the variance and standard deviation (of profit, NOT of tire life) for producing an all weather tire? Of producing a high performance tire?
Consider the following stemplot. The mean of the data represented in this stemplot ?
samuel cartwright is suing over a workmanship defect in a data backup system that cost him 3 years of client data. he
Assume that the event "Mary takes Mathematics 23 and Government 35" is more likely than the event "Mary takes Mathematics 23." Why are we not making this fallacy here?
In a Singapore Edition of Business Times, diamond pricing we explored. The price of a diamond is based on the diamond's weight, color, and clarity. A Simple random sample of 18 one-half-carat diamonds had the following prices, in dollar's
Construct a 90 percent confidence interval for the true mean weight. Describe factors which might cause variation in the weight of Tootsie Rolls during manufacture.
Find the standard score (z-score) for students who study the following hours in a particular week. Round Z to the nearest hundredth and interpret the meaning of each answer as it pertains to this problem.
From this group of 2000 accounts what is the probability that an account has a balance of $500 or more, given that it is 3 or more years old?
Are X and Y independent?
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