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Suppose that a sample of 15 randomly chosen people were put on a special weight loss diet. The amount of weight lost, in pounds, follows an unknown distribution with mean equal to 12 pounds and standard deviation equal to 3 pounds. Assume that the distribution for the weight loss is normal.
Assume Ramon has kept track of the times for the first accidents to occur for 40 different days. Let C = the total cumulative time. Then C follows which distribution?
Seven employees were included from Area A, 9 from Area B and 12 from Area C. The test statistic was computed to be 4.91. What can we conclude at the 0.05 level?
Joes Trucking provides shipping service from the outlying areas of New York City to a known distribution point within Manhattan. To understand the number of trucks required for a given service level agreement defined by a guaranteed delivery i..
To obtain a 95% interval estimate for the mean student commuting time to the IUPUI campus with a margin of sampling error of MOE = 2 minutes, the minimum sample size should be n = _____. A pilot sample of students provided a planning value of σ^ =..
Most undergraduate business students will not go on to become actual practitioners of statistical research and analysis. Considering this fact, why should such individuals bother to become familiar with business statistics?
In a Gallup poll done in 2007, a randomly selected sample of n = 254 U.S. parents was asked how often the television was on when they ate dinner as a family.
Admissions officers search the pile of envelopes, opening them at random to look for three applicants with SAT totals over 1800. How many envelopes do you think they will need to open?
In Major League Baseball there are five teams in the Western Division of the National League: Arizona, Los Angeles, San Francisco, San Diego, and Colorado. How many different orders of finish are there for these five teams?
A university is concerned that it is taking students too long to complete their requirements and graduate; the average time for all students is 4.7 years.
A test run using the new method resulted in 27 golf carts being assembled in 1.56 hours with a standard deviation of .45. Did the new method result in the golf carts being assembled faster?
do children less than a year old recognize the difference between naughty and nice and show show a preference for nice
Is it an SRS? A corporation employs 2000 male and 500 female engineers. A stratified random sample of 200 male and 50 female engineers gives each engineer.
Create the 90% confidence interval for mean score of all such subjects. You may suppose scores are usually distributed.
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