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Newborns were screened for human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome (AIDS) in a specific Massachusetts hospital in the inner city. Data collected in a previous study showed that 30 newborns tested positive out of 3741 newborns tested. All others tested negative of course. If we screened 500 newborns from this particular hospital then:
(a) What is probability that exactly 5 newborns will test positive for HIV?
(b) What is probability that fewer than 5 newborns will test positive for HIV?
(c) What is probability that at least 7 newborns will test positive for HIV?
(d) Would it be unusual if more than 10 newborns tested positive?
(e) What is probability that at least 2 and no more than 10 of newborns will test positive for HIV?
Assume the results of different games played in the series are independent of each other. Find the p.m.f. of the distribution of N := duration" of the baseball series.
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
Use the normal approximation for the Mann-Whitney U test to analyze the data above. (Round your answer to two decimal places.)
Entrepreneurship researchers are interested in the relationship between entrepreneurial behaviour of firms, such as innovation or new business venturing, and performance indicators, such as sales growth or profitability.
There are m machines in a factory operating independently. Each machine works for a time period that is exponentially distributed with mean 1/µ.
The following lists the 10 largest automakers in the world and the number of vehicles produced by each in a recent year.
Typical age, in days, at which various species of ducks begin to fly range from 39.5 (for blue-winged teals) to 62.5 (for canvasbacks).
A wholesaler has recently developed a computerized sales invoicing system. Prior to implementing this system, a manual system was used. The distribution of the number of errors per invoice for the manual system is as follows
Normal distribution of 5 pounds per square inch, standard deviation of 1.5 pounds per square inch, what proportion have less that 3.17 pounds per square inch, at least 3.6 pounds, are between 5 and 5.5 and 95% will be contained between what two va..
The cost of 5 gallons of ice cream has a variance 36 with a mean of 31 dollars during the summer. What is the probability that the sample mean would be less than 29.8 dollars if a sample of 39 5 gallon pails is randomly selected?
You are running a chi-squared test. You have 2 groups with 3 characteristics each, what would your critical value be with an alpha of .025?
Can you determine the number of levels used for each factor? Explain. Describe a treatment for this experiment and determine the number of treatments used.
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