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1. For many years businesses have struggled with the rising cost of health care. But recently, the increases have slowed due to less inflation in health care prices and employees paying for a larger portion of health care benefits. A recent Mercer survey showed that 52% of U.S. employers were likely to require higher employee contributions for health care coverage in 2009 (BusinessWeek, February 16, 2009). Suppose the survey was based on a sample of 800 companies. Compute the margin of error and a 95% confidence interval for the proportion of companies likely to require higher employee contributions for health care coverage in 2009.
2. America's young people are heavy Internet users; 87% of Americans ages 12 to 17 are Internet users (The Cincinnati Enquirer, February 7, 2006). MySpace was voted the most popular website by 9% in a sample survey of Internet users in this age group. Suppose 1400 youths participated in the survey. What is the margin of error, and what is the interval estimate of the population proportion for which MySpace is the most popular website? Use a 95% confidence level.
If an open box has a square base and a volume of 106 in.3 and is constructed from a tin sheet, find the dimensions of the box, assuming a minimum amount of material is used in its construction.
What are the different ways to graph a line graph? Provide an example of each. Does one seem better than the other? In what ways is it better?
the speed of an airplane in still air is 283 mph. the plane travels 477 mi against the wind and 1445 mi with the wind in a total time of 18 hrs. what is the speed of the wind?
A chemist needs 140 ml of a 66% solution but has only 51% and 93% solutions available. Find how many ml of each that should be mixed to get the desired solution.
Find how fast temperature is changing for the bug after 2 seconds if the temperature function satisfies Tz(√3, -8) = 3 and Ty(√3, -8) = -1. Provide a graph of the bug's position during the first 6 seconds.
A bacteria culture starts with 7 bacteria which multiply simultaneously every three house. If the first generation is born fromt he initial group at 12 midnight
Moe and Joe flip a slightly unbalanced coin until the one or the other loses all his money. On a single flip Joe wins with probability .49. Joe starts with $8 and Moe start with $4.
A motorboat travels 448km in 7 hours going upstream. It travels 630km going downstream in the same amount of time. What is the rate of the boat in still water and what is the rate of the current?
Compute the probability of all the three stocks rise - Compute the probability that All three stocks rise
create a data set of your own regarding something of interest to you. populate the data set with sample data at least
The vertical motion of a mass attached to a spring is described by the initial value problem (1/4)x"+x'+x=0, x(0)=4, x'(0)=2. Determine the maximum vertical displacement of the mass.
Which statement best describes the two offers
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