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Consider two machines, A and B, each producing the same items. Each machine produces large number of these items every day. However, production per day from machine B, being newer, is twice that of A. further the rate of defectives is 1% for B and 2% for A. the daily output of the machines is combined and then a random sample of size 12 taken. Find the probability that the sample contains 2 defective items. What assumptions are you making?
Detremine the mean, standard deviation, and variance for this frequency distribution.
Ther are 8 balls in a sample 5 white and 3 black .x is the number of black balls in the sample. three white are selected. white are selected from sample.write the probability distribution and find of x . and find mean , variance and standard deri..
Obtain an explicit expression for the reliability of a system consisting of a parallel arrangement of two components, C1 and C2 , with respective reliabilities, R1 and R2. Explain in words what the expression for the system reliability means in terms..
bob is selling 80 pound bags of fertilizer. the machine he uses have a standard deviation of fill equal to 1.5 pounds.
For a binomial probability experiment, with n=150 and p=.2, it is appropriate to use the normal approximation to the binomial distribution.
in the world series of baseball two teams a and b play a sequence of games against each other and the first team that
1. An airplane takes off from a coastal city where the air temperature is 20 °C (68 °F) and climbs to cruising altitude. At what altitude will the outside temperature be 0 °C?
What score was earned by more students than any other score? Why? What was the highest score earned on the exam?
a teacher gave a reading test to a class of 5th grade students and computed the mean median and mode for the test
The probability that you win is 6/36=1/6, and P(loss) = 5/6. Find a rough range for a) 200 plays, (b) 20, 000 plays. You must show your work when you compute the SD of the box.
assume that a simple random sample has been selected from a normally distributed population and test the given claim.
The probability that the cause and the cure for all cancers will be discovered before the year 2020 is .20. What viewpoint of probability does this statement illustrate?
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