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A survey of 865 voters in New York State reveals that 408 favor approval of an issue before the legislature. Construct the 95% confidence interval for the true proportion of all voters in the state who favor approval.
Also find information about blood donations and the percentage of each type donated. How do the charts compare? Why is the collection of type O blood so important?
A Department of Trasporta repot about air travel found that nationwide, 76% of all flights are on time. What is the probablity that you will have have excatly 80 flights on time?
A college class believes that the average grade average of psychology students and the average grade averages of biology students are different.
The Financial Advisor exam has a mean of 500 and a standard deviation of 20. If the bank chooses to hire either Steve or Mark based solely on their exam performance, who is the bank more likely to hire? Show evidence for your answer.
Evaluate this statement: "Without good measurement, statistical analysis is worthless." Do you believe it is an overgeneralization.
The amount of money spent by a customer is uniformly distributed over (0,100). Find the mean and variance of the amount of money that the store takes on a given day.
Perform a proper analysis. Describe your null and alternative hypothesis, report the p-value. What is your conclusion?
WonderDrug Company wants to test the effectiveness of a new headache drug. What sampling technique (simple random, stratified random, cluster, convenience) is WonderDrug Company using in each of the following studies?
In the Arnold's Muffler example for the exponential distribution, the average rate of service was given as 3 per hour, and the times were ex-pressed in hours.
A 95% confidence interval for the average difference between the two reaction times (traditional - LED) was (-171.37, 174.44). Which of the following is the appropriate conclusion?
Explain why a strong correlation would be found between weekly sales of firewood and weekly sales of cough drops over a 1-year period. Does the strong correlation mean that one variable causes the other?
An education task force looking at poverty levels in the United States has collected data for each state and the District of Columbia on the total number of people below the poverty level and the number of adults over the age of 25 who did not g..
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