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8. Which of the statements about line-balancing is true?
a. if a precedence relationship exists between tasks A and B, they cannot be assigned to the same work station.
b. if a line's balance delay factor is maximized, its efficiency is maximized.
c. the theoretical minimum number of work stations can never be achieved, hence the name "theoretical".
d. if the cycle time is reduced, productivity will increase.
Each organization gets a 90% confidence interval. About how many of these intervals should cover the population average?
The lifetime of African Cichlids is unknown but the sample of 75 cichlids were taken and its mean life time was 5.2 years with a margin error of 420 days for 95% confidence a) What is the 95% confidence interval for the lifetime of the African fish..
Calculate the mean and standard deviation of the following data sets, then produce a five number summary and box plot of data.
The mean output power is 42 watts, with a standard deviation of 8 watts Assuming a confidence level of 95%, which of the following statements do these data support?
Give an example of two variables that probably have a significant linear correlation coefficient, but one variable does not necessarily cause the other.
A snack company distributes chips in bags labeled 6 ounces. The local Bureau of Weights and Measures randomly selects 50 bags of chips and obtains a sample mean of 5.9 ounces.
Explain and give an example of: z-tests, t-tests, single sample t-tests, a dependent sample t-test, or an independent sample t-test.
John earned a score of 89 on both exams. On which exam did John receive the higher letter grade? What was the minimum exam score required for a B in Statistics? What was the minimum exam score required for a B in Psychology?
To test productivity quickly, he has his shift foremen record number of defective T-shirts made in randomly sampled week. Critical Value: t =Test Statistic (Show procedure.): t =?
A new weight-watching company, Weight Reducers International, advertises that those who join will lose, on average, 10 pounds the first two weeks with a standard deviation of 2.8 pounds.
A defective picture tube was discovered in the latest shipment. What is the probability that it came from Tyson Wholesale?
Call this the customer's age. Next, for each of 100 customers, draw from the N(10; 2) distribution and call this the customer's length of membership.
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