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Construct a 96% confidence interval for the population proportion when 285 people out of 750 were in favour of boycotting the World Cup matches if prices were to rise above $100 for 64 televised matches. Show your answer in percentage form, rounded to 2 decimal places.
Develop a joint probability table for these data. If a student goes full time, determine the probability that school quality is first reason for selecting a school?
Assuming that the standard deviation and the normal shape are unchanged, to what level must the mean reduce so that 20 gallons per week is the third quartile rather than the mean?
Use simple exponential smoothing with α = 0.3 to forecast battery sales for February through May. Assume that the forecast for January was for 22 batteries.
In drawing an inference using a single mean in hypothesis testing, you often have a choice between doing a z-test or a t-test. Many researchers will always choose to do the t-test even under circumstances where the z-test would work as well.
Assume the probability of a tire blowout is 0.178% per 50,000 miles of use and that a person travels 15,000 miles per year in a car.
The following data represent the service charge for direct-deposit customers if a customer's account falls below the minimum required $1,500 balance for a sample of 26 banks.
Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury system appear to be fair?
Ethics. The one-time fling! Have you ever purchased an article of clothing (dress, sports, jackets, etc.) worn the item once to a party, then returned the purchase?
Determine the probability of randomly selecting a person graduating with Master's degree who didn't major in Education.
More than 5 percentage points in either direction from what would have been got by interviewing all voters in United States." Determine sample size suggested by this statement.
Explain the purpose of the chi-square test for independence. Provide some practical examples where this test might be used in business.
If 1st wave of such 5000 emails were sent to the target age group in Hang Road region, What is the probability that 1750 or fewer people will respond and switch their credit card?
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