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Describe a where you might want to use a dummy variable in a multiple regression. What would the dummy variable buy you in that situation?
To conclude the effect of a new fertilizer on productivity of tomato plants one group of plants is treated with the new fertilizer as a second group is grown without such treatment. The number of ripe tomatoes produced by each group is counted.
The monthly income of residents of Dayton is normally distributed with a mean of $3000 and a standard deviation of $500.
From past data, it is recognized that company's production process results in normally distributed yield strengths. Test company's claim at a = 0.05.
Computing the probability values using normal distribution - Find the probability that a regular rat (without the supplement) would solve the maze with a score less than or equal to X = 24 errors?
The accounting department at Weston Materials, Inc., national manufacturer of unattached garages, reports that it takes two construction workers mean of 32 hours and standard deviation of 2 hours to erect the Red Barn model.
The project requires you forecast the historical data, replicating the appropriate trends, seasonalities, week-over-week variability, etc. Please refer to the chapter and materials on Forecasting for the procedures to do.
Smoking on campus. suppose 20% of the students on campus smoke. you select two students at random. In what percentage of samples will both students be smokers?
Employ the frequency distribution, which describes the response of a survey of college students when asked, "How often do you wear a seat belt when riding in a car driven by someone else?"
Write down the advantages and disadvantages of using computer software for decision making.
The following frequency table summarizes the ages of 100 shoppers at the local grocery store. Compute the sample variance and standard deviation for this data set. Please show your work in Excel.
What probability distribution does n1 alone have? Specify the values of the sample size index and parameter for that distribution.
Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..
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