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1. In January 2005, a company that monitors Internet traffic (WebSideStory) reported that its sampling revealed that the Mozilla Firefox browser launched in 2004 had grabbed a 4.6% share of the market.
I. If the sample were based on 2,000 users, could Microsoft conclude that Mozilla has a less than 5% share of the market?
II. WebSideStory claims that its sample includes all the daily Internet users. If that's the case, then can Microsoft conclude that Mozilla has a less than 5% share of the market?
At the 0.01 level of significance, does the machine appear to be in need of maintenance and calibration? Determine and interpret the p-value for the test.
Proportion of out-of-tolerance items is greater than 0.02, the robot will be overhauled. Otherwise it will be allowed to continue operating. What is the probability that a satisfactory robot will be overhauled unnecessarily?
Let's say 15% percent of Americans had a stroke last year. Now, If I choose 17 people at random, find the probability that 6 of them had a stroke last year.
1. If a new municipal bond is to be issued by a city, what is the probability that it will receive an A rating? 2. What proportion of municipal bonds are issued by cities? 3. What proportion of municipal bonds are issued by suburbs?
Recently the European Community (EC) decided to lower its subsidies to makers of pasta. In deciding by what amount to reduce total subsidies.
Recent crime reports indicate that 4.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.
a randomized controlled trial is run to evaluate the effectiveness of a new drug for asthma in children with the
A recent survey conducted by Towers Perrin and published in the Financial Times showed that among 460 organizations in 13 European countries, 93% have bonus.
The data below represents the population of a certain country every 10 years for the years? 1900-2000. How do I determine the? least-squares regression?
A sample of 837 ninth-grade girls was asked how much time they spent watching music videos each week. The girls also were asked to rate how concerned.
when a machine is improperly adjusted it has probability 0.2 of producing a defective item. each day the machine is run
Assess the impact of the program statistically. Use a two-sided test and let alpha = 0.05.
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