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Two people are going from Seattle to Portland. Alice has 50% chance of arriving at 5:00 and a 50% chance of arriving at 6:00. Bob's arrival time is independent of Alice's. The number of minutes after 4:30 that he arrives is an exponential random variable with mean 45. What is the probability that Alice arrives before Bob?
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages.
What is the estimate of the proporation of employees who do not use the ATM in a month? Develop a 95 percent confidence interval for the mean number of transactions per month.
Data is given in the table below. Process data as illustrate in the paper on the Mann-Whitney U test. Critical Value:Test Statistic (Show procedure.)Z .
The first unit required 9800 hours to manufacture. The company expects to experience an 82% unit learning curve. Estimate the cost of the 20th unit. (Round intermediate calculations to 4 decimal places)
Some people who bought X-game gaming systems complained about having received defective systems. The industry standard for such systems has been 98% non-defective systems.
at a large university it is known that 50 of the students live on campus. the director of student life is going to take
A sample of 140 golfers showed that their average score on a particular golf course was 93.38 with a standard deviation of 4.36. Answer each of the following (show all work and state the final answer to at least two decimal places.):
Based on the scatter diagram, does there appear to be any relationship between the number of assemblers and production? Explain.
What is the purpose of the F test in a multiple regression? What is a qualitative independent variable? How would we/what technique would we use to include a qualitative independent variable in a regression model.
What is the difference between dependent and independent samples? Discuss differences is statistical treatment, statistical power, and data management.
At the .05 significance level, can we conclude that more than 60% of the homes have an attached garage? What is the p-value.
Describe the data scales best suited for presentation in a pie chart. How effective are the pie charts that often accompany a newspaper article in explaining the statistics used in the article?
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