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1. Approval rating. A newspaper reports that the gover- nor's approval rating stands at 65%. The article adds that the poll is based on a random sample of 972 adults and has a margin of error of 2.5%. What level of confidence did the pollsters use?
2. Amendment. The Board of Directors of a publicly traded company says that a proposed amendment to their bylaws is likely to win approval in the upcoming election because a poll of 1505 stock owners indicated that 52% would vote in favor. The Board goes on to say that the margin of error for this poll was 3%.
a) Explain why the poll is actually inconclusive.
b) What confidence level did the pollsters use?
you are standing in line at the super market when a scientist standing behind you strikes up a conversation with you.
Schadek Silkscreen Printing, Inc. purchases plastic cups on which to print logos for sporting events, proms, birthdays, and other special occasions. What is the estimated proportion defective in the population?
It is suspected that high pollution levels (measured by number of particulates found in the air) increase the levels of asthma attacks. A researcher collects data on50 people who experienced an asthma attack during the course of one year.
The number of cars arriving at Joe Kelly's oil change and tune-up place during the last 200 hours of operation is observed to be the following.
in the fall semester of 2011 48.1 of students at uta were women. suppose that two students from uta are selected at
a farm brings 15 tons of watermelons to market. find 95 confidence interval for the population mean? given a population
If an apartment is selected at random, what is the probability that it is not a 2 bedroom apartment on the 2nd floor?
Assuming that his list represents a simple random sample of those persons who could be called, what is the probability that Albert will meet or exceed his quota?
in a sample of 56 addicts 28 were given a new drug to help them overcome their addiction while the remaining 28 were
How many seats sould be in the non-smoking area in order to be very sure (mean+3StandardDeviation) of having enough seating there?
At the .025 significance level, can we conclude that less than 88 percent of the orders are delivered in less than 10 minutes?
a manufacturer of plumbing fixtures has developed a new type of washerless faucet. let p p a randomly selected faucet
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