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Unformatted text preview: No long calculation necessary, but explain briefly. 2. American Cellular and Computer (AC&C) has 400 employees; their average income is 60,000 dollars and the SD is 25,000 dollars. Another company, Bearizon, has 100 employees; the rms of the incomes at Bearizon is 50,000 and the SD is 30,000 dollars. The two companies merge to form Conglomcast. All 500 employees keep their original salaries. (a) Find the average income for the 100 original Bearizon employees. (b) Find the average income for all 500 Conglomcast employees. (c) Find the SD of all 500 incomes at Conglomcast. 3. A group of students has an average weight of 155 pounds and standard deviation of 25 pounds. The histogram of the weights follows the normal curve closely. (In using the normal table, you can round percents and z values to the nearest value on the table.) (a) About what percentage of the students weigh more than 175 pounds? (b) About what is the 42nd percentile of the weights?...
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This note was uploaded on 02/08/2011 for the course STAT 21 taught by Professor Anderes during the Fall '08 term at University of California, Berkeley.
- Fall '08