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Question: A tractor manufacturing plant has been experiencing problems with the division that makes the transmissions. A Pareto diagram, shown in Fig., has been constructed based on recent experience.
a. What is the most important problem, in terms of the number of transmissions affected? What percent of all difficulties does this problem represent?
b. What is the next most important problem? What percent does it represent?
c. What percent of defective transmissions do the top two problems, taken together, represent?
d. What percent of problems do the top three problems together represent?
e. Write a paragraph, as if to your supervisor, summarizing the situation and recommending action.
A frequency distribution was developed. The lower endpoint of the first class is 9.30, and the midpoint is 9.35. what is the upper endpoint of this class?
Determine the percentage of respondents who favor stronger gun control laws and the percentage of respondents who oppose stronger gun control laws.
In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested as a treatment for upper respiratory infections in children.
in a test of hypotheses a researcher used the level of significance a .05. based on a random sample she obtained a
Children per family for certain community from census data. Recognize random variable of interest, find out whether is a discrete or continuos, and write its possible values.
Share 1 real-world binomial distribution situation and 1 real-world Poisson distribution situation. Be sure to explain why each example is defined as binomial or Poisson.
A population has a standard deviation of 16. If a sample of size 64 is selected from this population, what is the probability that the sample mean will be within 2 of the population mean?
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
In each case, explain whether the experiment was a matched-pair design, a block design, or neither.- Explain whether each of the following experiments was single-blind, double-blind, or neither.
Find the probability that the system is operational during the time period and what is the probability that component E3 had been operational?
Assuming that the population variances from both types of tablets are equal, construct and interpret a 95% confidence interval estimate of the difference between the population mean battery life of the two types of tablets.
How do we decide if the homogeneity of variance assumption is significantly violated?
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