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For evaluation purposes, Megan needs to determine how many students she has to survey to estimate the proportion satisfied with attendance in her tennis program. There are about 1,250 students in her target population. Since no surveys have been previously done, she has no idea as to what proportion will score the program high. She is comfortable with being able to estimate the proportion within plus or minus 5% with a 95% confidence level. How many tennis club members do you recommend that she survey? Would that number change if after gathering some information she estimates that about 80% are satisfied?
What is the fewest number of eggs possible in the basket? Please explain step by step how to get to the fewest number of eggs in detail on what you did?
Estimate the number of workers in the sample who are union members by giving the mean of the relevant distribution (that is, the expectation of the relevant random variable). Do not round your response.
leisure time in gallup poll 1010 adults were randomly selected and asked if they were satisfied or dissatisfied with
Use the data to estimate the true population mean gas tax with 90% confidence. Does your interval contain the national average of 21 cents?
A popular lottery game is one in which three digits from 0 to 9 are chosen, so the winning number can be any of the 1000 numbers from 000 to 999.
If you select a random sample of 10 students, what is the probability of at least 2 have parents pay their cell phone expenses?
A laser diode has a gain peak between 4.45-4.65 µm, and we want to have only a single mode at 4.5 µm as output of this laser diode. What should be the length of the laser so that only a single mode is allowed within the laser? Take the refract..
While the rank/size rule generally describes the distribution of city sizes remarkably well, it does tend to overpredict the number of small cities.
In which of the following games of chance would you be willing to assume independence of X and Y in making a probability model? Explain your answer in each case.
(a) Suppose we construct a 99% con?dence interval. What are we 99% con?dent about? (b) Which of the con?dence intervals is wider, 90% or 99%? (c) In computing a con?dence interval, when do you use the t-distribution and when do you use z, with normal..
the mean annual salary for chauffeurs is 21000. a random sample of size 45 is drawn from this population. assume that
a retailer is looking to evaluate its customer service. management has determined that if the retailer wants to stay
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