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A production process operates with 3% nonconformities. Every hour a sample of 50 units is taken and the number of nonconforming items is counted. If one or more nonconforming units are found, the process is stopped and the quality control technician searches for an assignable cause of nonconforming production. Evaluate the performance of this decision.
The accompanying two histograms represent the distribution of acceptance rates (percent accepted) among 25 business schools in 1995. The histograms use different class intervals, but are based on the same data. In each class interval, the left endpoi..
Distinct random variable
There were 25 subjects included in each of the combinations of gender and smoking status. One of the variables measured was the heart rate after six minutes of exercise. A two-way ANOVA is performed with the resulting ANOVA table given below
In past, mean processing time was 45 days. At 0.05 level of significance, is there evidence that mean processing time has changed from 45 days?
What was the critical F value chosen?
Data in table represent number of consumer complaints against major U.S. airlines. If one complaint from table is arbitrarily chosen, determine the probability that it was filed against United Airlines.
Explain why random samples are preferred to nonrandom samples.
ABC Corporation has been using statistical process control for several months.
One state lottery has 1000 prizes of $1, 200 prizes of $5, 50 prizes of $25, 15 prizes of $150, 4 prizes of $500, and 1 prize of $2500. What is the lottery expected profit per ticket?
The researcher computes the sum of squares for groups as SSG = 40030 and the sum of squares for error as SSE = 414780. The numerical value of the ANOVA F statistic is
Analyze the data using linear contrasts to make the following comparisons:
Examined the effect of body position on blood pressure
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