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"Cars Becoming Weapon of Choice" reported on the situation in Iraq as of January 2005: "There were two car bombs on the last days of June, 11 in July and 12 in August. The numbers then surged, with 26 in September, 43 in October, and 48 in November. December saw 27, and January is averaging about one a day-a dozen in the first 11 days." The article mentions that "those bombs killed about 1,000 people, both Iraqis and Americans, and wounded twice as many."27
a. Sketch a time series plot of the data for June through December 2004.
b. Explain how a prediction for January 2005 would differ, depending on whether it was based on the most recent trend in the time series plot or based on a regression line for the data.
c. What was the average number of people killed in each of those 181 car bombings?
Your Web page has five different links, and a user can click on one of the links or can leave the page. You record the length of time that a user spends on the Web page before clicking one of the links or leaving the page.
Calculate the mean of a gamma G(4.3, 6.2) random variable using- Accept-Reject with a gamma G(4, 7) candidate;- Metropolis-Hastings with a gamma G(4, 7) candidate;
A study looked at the percentages of lowincome students with federally funded financial aid at the nation's top 20 universities.
bill is interested in the infrequent arrival of birds on a remote pacific island in the south seas. the mean number
In forecasting, MacDonald's Wing® discovered that when it opened its store to the public, it was able to sell 5,000 parachutes in the first year. Given the equation; y=a+bx. Where ‘y' represents the number of sales and ‘a' is the number they start..
Calculate Statistically Whether
testing for population proportion -the personnel director of a large insurance company is interested in reducing the
find the z-scores that separate the middle 71 of the distribution from the area in the tails of the standard normal
The mean SAT score in mathematics is 498. The founders of a nationwide SAT preparation course claim that graduates of the course score higher, on average, than the national mean.
Determine the coefficient of correlation between the two variables. Interpret the value.
Features of index numbers
Women have been on a diet within the past 12 months. Using Normal approximation, what is the probability (±0.001) that 76% or more of the women in the sample have been on a diet?
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