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1. An opinion poll asked British Columbians: "Are you in favour of a Las-Vegas-style casino in Vancouver? Yes or No". A random sample of 500 British Columbians found that 130 were in favour of such a casino.
(a) Construct a 89% confidence interval estimate of the overall percentage of the B.C. population in favour of such a casino.
(b) The government also wants to estimate what percent of British Columbians favour allowing cigarette smoking in casinos. The government requires that the error on the estimate be no more than 3% with 89% confidence. What size of sample would be required to do this?
2. Peter, the head of a survey organization, is planning to do a survey to estimate the percentage of people who intend to vote for the federal Liberal Party in an upcoming by-election. He wants the estimate of the percentage to be correct to within 2%, 19 times out of 20. At first, Peter has absolutely no idea what fraction of the population will vote Liberal. However, Peter's assistant Janice believes that the Liberal Party will receive approximately 75% of the vote in that riding. If survey costs are $10 per person, how much money can be saved by using Janice's estimate of the percentage rather than Peter's estimate of "no idea"?
The author collected data consisting of the month of birth of actors who won Oscars. Use a 0.05 significance level to test the claim that Oscar winning actors are born in different months with the same frequency.
Research by the Illinois Banking Company revealed that only 10 percent of their customers wait more than five minutes to do their banking. Management considers this reasonable and will not add more tellers unless the proportion becomes larger than..
National data show that, on average, college freshman spend 7.5 hours a week going to parties. President DeRosa doesn't believe that these figures apply at his school; he thinks freshman at his school party less.
Can you please give one example of a Qualitative data and one example of a Quantitative Data that you face daily? Please explain why it is a Quantitative or Qualitative data and describe the scale of measurement.
At the .10 significance level, can we conclude that less than 88 percent of the orders are delivered in less than 10 minutes. What is the decision rule?
Use the value 20 for the population standard deviation of scores on this subsection.
The negotiation will end successfully? After 4 hours? After 8 hours? How does the precentage likelihood of a successful negotiation change over the course of time?
A bond analyst is analyzing interest rates for corresponding municipal bonds issued by two different states. At α = .05, is there a difference in interest rates paid by two states?
In a study of elephants a researcher wishes to determine the average weight of a certain subspecies of elephants. From previous studies, the standard deviation of the weights of elephants in this subspecies is known to be 1500 pounds.
A random sample of 20 single men was asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that:
The management at Black Angus is considering hiring 8 additional servers. Currently 12 servers are serving 4 tables each per hour. Servers make $11.25 on overtime per hour.
Determine the probability that among 6 companies surveyed at random, number that provide employees 4 weeks of vacation after 15 years of employment.
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