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Rob Crow production engineer at Ross Manufacturing maintains detailed records on the number of times each machine breaks down and requires service during the week. Rob's records show that the Puret grinder has required repair service according to the following distribution. Compute the mean, for the following probability distribution of the number of breakdowns per week.
Breakdowns Probability 0 .333 1 .333 2 .167 3 .167
The owner of Maumee Ford-Mercury wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.
A survey of top executives revealed that 35 percent of them regularly read Time magazine, 20 percent read Newsweek, and 40 percent read U.S. News and World Report. Ten percent read both Time and U.S. News and World Report.
Using the ten sample-mean values, estimate the mean of the population and the variance of x .
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
A manufacturer claims that the life span of its tires is 52,000 miles. You work for a consumer protection agency and you are testing these tires. Assume the life spans of the tires are normally distributed.
Calculate the control limits for a c chart when Ubar = 3.0%, n = 60, and you collect one sample per hour for 40 hours of production. (2 sets of control limits required, x bar and range)
What is the probability that the person thinks that "Made in America" ads boost sales and uses social media online?
Suppose the joint probability density function of X and Y is uniform in the plane square with corners (0,0), (0,3), (3,0) and (3,3). Find the probability of X > 1 or Y > 1. Find the probability of X + Y
There are two boxes, Box A and Box B. Box A has 40 tags with the number 1, 50 tags with the number 10, and 10 tags with the number 100. Box B has 40 tags with the number 100, 50 tags with the number 10, and 10 tags with the number 1.
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
Please use a combination of content and supportive examples.
San francisco also reported that a scientific polling organization found that new zealanders favor the law by a margin of 56.4% to 39.3%. Explain why the two polls can give such widely differing results and which poll is likely to be more reliable..
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