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A research firm wants to be 90% confident that a population percentage has been estimated to within 3 percentage points. The research manager calculates the necessary sample size with 0.5 as his estimate of the population proportion.
A new business school graduate who has just joined the firm questions the research manager further, and they agree that the population proportion is no more than 0.3. If interviews cost $10 each, how much money has the new graduate just saved the company?
For the observations in the previous problem, compute the sample 20% Winsorized variance.- In the previous problem, would you expect the sample variance to be larger or smaller than 51.4? Verify your answer.
Each group will use a search engine of their choice to find combined GIS/GPS applications as well as look at various vendor sites to find success stories. (For GPS vendors, look at http://biz.yahoo.com (directory) and Google.) Each group will make..
can a test of significance show a statistically significant relationship while a measure of association shows a weak
Since 38% is less than 40%, does this mean that immediate production cutbacks are needed or can this difference of 2 percentage points be attributed to sampling?
find the diamter of a pipe where p1-p2 is 55 psi and the height rise along the pipe is 60 ft or h2-h1 60 ft the exit
In this case, we are going to study some data collected from Kelly Blue Book for several hundred 2005 used General Motors (GM) cars. This data allows one to develop regression models to determine car values based on
USA today conducted a survey asking readers, "What is the most hilarious thing that has ever happened to you en route to or during a business trip? What kind of sampling method is this?
Design a contingency table that will hold your data. What are your degrees of freedom and critical value at a 0.05 confidence level? You do not need data to answer this.
at baseball practice a batter can swing at a pitch until he gets 3 hits. the probability that he hits a random pitch is
Before the rush began for Christmas shopping, a department store had noted that the percentage of its customers who use the store's credit card, the percentage of those who use a major credit card, and the percentage of those who pay cash are the ..
Advertising coefficient is 200 and t stat is 1.75. Which of the following statements is an accurate interpretation of the situation when using an alpha of .10
suppose that the specifications on the diameter of a rotor shaft are 0.25plusmn0.002. if the diameters are distributed
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