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A finite lot of 40 digital watches includes 15% nonconforming units. Using hypergeometric distribution, determine the probability that the sample of 6 will comprise 2 nonconforming watches?
Use the model to predict the selling price of a house that is 1,860 square feet.
A doctor advices a patient to go on a particular diet for 2 weeks. Considering the general condition of the patient, the amount of weight the patient may loose is assumed to be between 5 Kg and 10 Kg,
A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of 5 examinations are selected at random and scored. The test scores are 56, 85, 65, 86, and 93. At 98% confidence, ..
From a random sample we know that the average duration of unemployment in a low developed region A is 147 days (with standard deviation sA = 32 days and nA = 230 unemployed).
For a particular population, a sample of n = 9 scores has a standard error of 4. For the same population, a sample of n = 16 scores would have a standard error of ??
Develop three regression models to predict the selling price based upon each of the other factors individually. Which of these is best?
Computing probability values using normal distribution - Find the proportion of the observations will fall in the interval from 40 to 60?
Last school year, student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classificati..
Find the 90% confidence interval for the variance and standard deviation for the time it takes a state police inspector to check a truck for safety if a sample of 27 trucks has a standard deviation of 6.8 minutes.
At the .01 level of signiicance, is the true mean greater than 10?
A health care professional wishes to estimate the birth weight of infants. How large a sample must she select if she desires to be 90% confident that the true mean is within 6 ounces of the sample mean?
In a clinical study of an allergy drug, 115 of the 204 subjects reported experiencing significant relief from their symptoms. At the 0.01 significance level, test the claim that more than half of all those using the drug experience relief.
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