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1. In a current election campaign, PSI has just found that 220 registered voters, out of 500 contacted, favor a particular candidate.
a. What's the 95% confidence interval estimate for the proportion of the population of registered voters that favor the candidate?
b. Suppose that PSI would like a .99 probability that the sample proportion is within + .03 of the population proportion. How large a sample size is needed to meet the required precision? (A previous sample of similar units yielded .44 for the sample proportion.)
There are 7 women and 9 men on a faculty. How many ways are there to select a committee of 5 members if at least 1 member must be a woman?
A church steeple casts a shadow 115 ft long, at the same time a 9.0 ft post casts a shadow 7.0 ft long. How high is the steeple?
Five years ago, an automobile manufacturer started offering an extended warranty to buyers of its sport-utility vehicle. The extended warranty covered defects occurring after the initial three-year warranty expired.
1. data from a national health survey show that mens average weight is normally distributed with a mean of 172 pounds
The manufacturer is designing an aquarium who's base is a regular hexagon the aquarium should have a volume of 24 ft.³ and use the least amount of material possible let us be the links in feet of the side of the base and what H be the height in..
Translate this verbal sentence into a mathematical sentence: The difference between six and twice a number is 4 more than the number.
question write an equation in slope-intercept form for the line that is perpendicular to the graph of 3x 2y 8 and
Find the best unbiased point estimate for the population mean weight of the packages received by the parcel service.
How many different ways can the letters of the word "BRKIZOVER" be arranged in a row if it is required that the letters IZO remain next to each other in order?
In the early months of 2010, Twitter added 0.3 million new accounts every day. At this rate, how many days would be needed to add 15 million new Twitter accounts? (Source: Twitter.)
Suppose a fair coin is tossed n times. Each coin toss costs 'd' dollars and the reward in obtaining 'X' heads is aX^2 + bX. Find the expected value of the net reward.
dance team knows 18 routines of which 8 are tap, 7 are ballet, and 3 are modern. The program can consist of any four routines. In how many ways can the manager choose which routines to present if there are no restrictions?
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