ufacturer knows that the number of items produced per hour by machine A and by machine B are normally distributed with a standard deviation of 4.4 items for machine ard deviation of 6.5 items for machine B. The mean hourly amount produced by machine A for a random sample of 57 hours was 229 units; the mean hourly amount pro ne B for a random sample of 47 hours was 215 units. Find a 99% confidence interval for the difference in mean parts produced per hour by these two machines. onfidence interval is

ufacturer knows that the number of items produced per hour by machine A and by machine B are normally distributed with a standard deviation of 4.4 items for machine ard deviation of 6.5 items for machine B. The mean hourly amount produced by machine A for a random sample of 57 hours was 229 units; the mean hourly amount pro ne B for a random sample of 47 hours was 215 units. Find a 99% confidence interval for the difference in mean parts produced per hour by these two machines. onfidence interval is

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter13: Probability And Calculus

Section13.2: Expected Value And Variance Of Continuous Random Variables

Problem 10E

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