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A manufacturing company designed a factorial experiment to determine whether the number of defective parts produced by two machines differed and if the number of defective parts produced also depended on whether the raw material needed by each machine was loaded manually or by an automatic feed system. the following data give the numbers of defective parts produced. Use a = .05 to test for any significant effect due to machine, loading system, and interaction. for the numbers in the table machine 1: manual is 30 and 34 and automatic is 30 and 26. Machine 2: manual is 20 and 22 and automatic is 24 and 28
data to test the difference between two weighing methods for wheat deliveries gave a mean difference of 10 kg with a
How much of the variation in the dependent variable would be explained by the independent variable in this situation? Use job satisfaction and employee turnover as the variables for this problem.
Based on a study of heights of men and women who do gymnastics, a researcher concludes that the exercise from playing gymnastics causes people to become shorter. Do you agree with this conclusion?
How do the graphical and computer-based methods of solving LP problems differ? In what ways are they the same? Under what circumstances would you prefer to use the graphical approach?
A study of 200 apples trees showed that the average number of apples per tree was 1000. The standard deviation of the population is 200. Which of the following is the 98% confidence interval for the mean number for all apples.
consider a binomial random variable where the number of trials is 9 and the probability of success on each trial is
Assume that the weight of fish for both lakesare normally distributed with equal population standard deviations. Test at =.01 significance level,if the mean weights of fish are different for these two lakes
The number of children, x, belonging to each of eight families registering for swimming was 2, 2, 2, 4, 2, 1, 2, 2. Find the mean, x. (Give answer correct to 2 decimal places.)
Given that the battery still works at 20, 000 km, what is the probability it lasts for at least another 40, 000km?
Show the odds of any two individuals having the same birthday are slightly greater than 1:1 (1:.9732 actually).
Use the data to Compute a 90% confidence interval to estimate the population average difference. Assume that the number of passengers is normally distributed.
1. find the probability distribution for x the sum of a fair four sided die and and fair sixsided die. b for x from
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