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a. What is an estimate of the proportion defective for the piston manufacturing process when it is control?
b. Construct a p chart for the manufacturing process, assuming each sample has 200 pistons.
c. With the results of part (b), what conclusion should be drawn if a sample of 200 has 20 defective pistons?
d. Compute the upper and lower control limits for an np char.
e. Answer part (c) using the results of part (d).
What is the probability that a particular driver had exactly two speeding violations?
Determine the typical seasonal patterns for sales using the ratio-to-moving-average method. Project the sales for 2004, and then seasonally adjust each quarter.
Make an Excel line graph of the data on computer viruses. Discuss the underlying causes that might explain the trend or pattern.
In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the following data have been gathered.
ANOVA is a powerful statistical test. How does ANOVA differ from other parametric tests? What are the conditions that must be met to use a one-way ANOVA?
The radar traps at each of the locations L1 L2 L3 L4 are operated 40 30 20 and 30 of the time a person who is speeding on his way to Penn State has a probablities of 2 1 5 and 2 respectivley of passing through these locations what is the probablit..
Why do you think it is significant to describe both the measure of central tendency and the measure of dispersion when talking about a data set?
In considering doing a logistic regression using the Enter method, it was suggested that I may want to consider doing a sequential LSR or stepwise logistic regression instead.
An article reports that when each football helmet in a random sample of 44 suspension-type helmets was subjected to a certain impact test, 25 showed damage.
A simple random sample of 50 speeds (in mph) is obtained from cars traveling on a section of I-10 through Tallahassee. The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the ..
Ski resort profits $1,500,000 during a good winter with lots of snow. The resort has a loss of $500,000 otherwise. The resort's historical climate data suggests that the probability of a good winter with lots of snow during any given year is 40%.
In a group of seven adult friends, what is the probability that: a) no one has done a one-time fling?
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