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If 10 people are given the vaccine what is the probability that at least 8 of them will develop immunity to the virus? A test was conducted regarding the reading skills of fourths graders. The resulting data is normally distributed with a mean of 75 and a standard deviation of 8.5. The lowest 6.3% of the students are required to retake the exam before the end of the school year. If a random student is chosen what is the probability that he or she scores less than 59? What score indicates that the student has to retake the exam?
There are 5,000,000 Adults 25+ in Mtown. An advertiser buys a schedule on Channel 45: 20 spots in early news with an average A25+ quarter hour audience of 150,000, 25 spots in daytime with an average A25+ quarter hour audience of 200,000, and 10 s..
A company producing a standard line and a deluxe line of dishwasher has the following time requirements (in minutes) in departments where either model can be processed
Scores on the ACT test have a mean of 21.1 and a standard deviation of 4.8. which is relatively better: a score of 1840 on he SAT or a score of 26.0 on the ACT test? why?
Population standard deviation of 4 inches. For any one person selected at random, find out the probability that their height will be?
A new improved rocket launching system is being considered for short-range assault rockets. The requirement is that 80% of the rockets shall strike the target area at 800 meters. A sample of 36 experimental launches is made with 29 striking the ta..
Fitting of simple linear equation - Prepare an equation showing how daily sales are related to number of customers per day.
A random sample of 20 patients in a weight loss clinical trial lost an average of 25 pounds over an 8 week period. The sample standard deviation is 10.
In order to compare the means of two populations, independent random samples of 484 observations are selected from each population, with the following results:
Find out the cheapest way of manufacturing today's batch of NasaMist.
Use a 5% significance level to test the claim that there appears to be a difference in the effectiveness of the two diets.
Find the probability of an untrained dog performing as well as Maggie. Is it unusual for an untrained dog to do as well as Maggie?
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of $2.78.
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