Homework 1 - assembly line The sample is the portion of...

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Daymanuel Sampson September 9, 2011 Homework #1 1.3 Orchard Contamination from Insecticides a. The population of interest to the researchers is any extensively grown crop that has the possibility of receiving pesticides. b. The sample in this case is dormant orchards grown in the San Joaquin Valley, California. 1.6 Precooling Vegetables a. The population in this case was Florida-grown vegetables. The sample used for study is 20 batches of green tomatoes. The statistical inference is that the new cooling system will require much lower water flow than conventional cooling systems in order to cool Florida vegetables. b. The data, if the theory holds true, can prove that the new system requires far less water than the conventional system when it comes to yielding effective cooling of Florida vegetables. 1.8 Monitoring Defective Items The population for this problem includes all the manufactured items off the
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Unformatted text preview: assembly line. The sample is the portion of items that are randomly selected and tested for defectiveness. The statistical inference to be made from this problem is the percentage of items that may be defective off the assembly line. 4 & 5. 6. Daymanuel Sampson September 9, 2011 Homework #1 (a) (b) Using Minitab, I calculated the 75 th percentile of lengths 1, 2 and 3 are 32.7, 36 and 39.7, respectively. (c) [attached] The distribution of the graph appears to be skewed to the right. (d) (e) [attached] Daymanuel Sampson September 9, 2011 Homework #1 7. [attached] Looking at the comparison between “old” and “new,” it is easy to see that their centers lie in two different areas. The “new” appears to be more spread out in terms of data and may be symmetric. The “old” however may be skewed to the right and has a smaller spread of figures....
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