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math201 db1

math201 db1 - 26th Aug 2011 Module 1 DB 1 RE 1 A...

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26th Aug. 2011 Module 1, DB 1 RE: 1. A statistician needs to survey a sample of 50 people that is representative of voters in his community. He prepared a list of phone numbers of 50 randomly selected, expected voters. Next morning, he came to work at 8:00 and began to make calls. By 11:00 a.m., his survey was done. Don't discuss what is not said. Discuss what is wrong with what is said. 2. The United Nation declared that the world's six-billionth inhabitant was born on October 12, 1999 in Bosnia. Don't discuss what is not said. Discuss what is said. 3. Jim Smart started a furniture business in December, 1998. During that month, his factory produced 50 tables. During the whole 1999, 1000 tables were made. In January 2000, Jim proudly announced, "During the last year we increased our production 20 times!" 4. Class width = Upper limit of a class - Lower limit of the same class. 5. A class frequency may never be equal to zero. 6. The data 9, 12, 18, 30, 25, 15, 8, 42, 29, 44, 31, 26 can be broken into 5 classes: 8-15, 16 -
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