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To find z-score and required probabilities based on Normal distribution.
Assume that children's weekly allowances are normally distributed in the population, with μ = $5 and σ = $1. What percentage of children gets a weekly allowance between $3.50 and $6.50?
a. 86.64%
b. 43.32%
c. 6.68%
d. 13.36%
Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use α = .05 to test whether the population variance specification is being violated.
Construct an appropriate control chart and comment on the process.
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Establish an approximate design to MTBF required for a system that will result in an approximate minimum total cost over a five year period if the system is to be operated 7500 hours per year
Answer the following three questions based on what you know about statistics now.
The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions
Describe and analyze your quantitative data and Briefly address the data analysis process.
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
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Conduct a statistical test to determine if the sample is representative of the population.
They find that these 100 people lost an average of 38 hours with a standard deviation of 9.5 hours. What is the P-value for this significance test?
Utilize a test of the difference among proportions when answering these questions. Illustrate the research hypothesis.
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