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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).
For a particular population, a sample of n = 9 scores has a standard error of 4. For the same population, a sample of n = 16 scores would have a standard error of ??
Estimating the value of the population mean on the basis of the sample mean alone produces a(n):
How would you use the binomial distribution in making a business decision during a normal day of work in the career of your choice?
Make a purchase using the internet. Test the claim that the proportion of consumers ages 35-44 who plan to make purchases using the internet has increased at α = 0.01.
Solve by completing the square: Solve using the square root property:
From these we calculate = 129.44; = 122.65; sx = 9.15; sy = 11.02. Perform the test H0: against the alternative H1:, using the two sample t-test, and state any assumptions you may require to do this test.
Marks on statistics midterm test are normally distributed with mean of 78 and a standard deviation of 6. Determine the probability that class of 50 has average midterm mark that is less than 75?
A study of 200 computer service firms revealed these incomes after taxes: What is the probability that a particular firm selected has $1 million or more in income after taxes?
Given route measured in terms of passengers carried (range is 0.1 to 1). Regress lfare on dist, passen and concen, and provide the heteroskedasticity-robust standard errors.
What is the prediction for Home Price if Square Feet = 2,000? (c) Would the intercept be meaningful if this regression applies to home sales in a certain subdivision?
The sample of 200 voters and tests Ho: P=0.5 versus H1:P(not equal)0.5 at 5% level. What is the power of the test if the true value of P is 0.55?
The means of two normally distributed populations, where the unknown population variances are assumed to not be equal. What is the upper confidence limit is?
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