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A machine normally makes items of which 5 % are defective. The practice of the producer is to check the machine every hour by drawing a sample of size 10, which he inspects. If the sample contains no defectives, he allows the machine to run for another hour. What is the probability that this practice will lead him to leave the machine alone when in fact it has shifted to producing items of which 10% are defective?
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.500 inches.
the economic policy institute periodically issues reports on wages of entry level workers. the institute reported that
What is the point estimator of the mean percentage of reservations that are cancelled on the day of the flight?
On the average, 6.7 cars arrive at the drive-up window of a bank every hour. Define the random variable X to be the number of cars arriving in any hour.
1. A regression analysis relating test scores (Y) to training hours (X) produced the following fitted equation: Yˆ =13.2 +1.3X . (a) What is the fitted value of the response variable corresponding to X = 8?
find the indicated probabilities using the geometric distribution or poisson distribution. then determine if the
A month later, the reading skills of all 100 students are assessed to determine whether the program was successful. What are the two populations of interest in this study?
Explain why his procedure was inappropriate. Which of the assumptions for inference was violated?- How might the design of this experiment have tainted the results?
The maximum temperature reached on any day can be classified as above freezing (a success) or below freezing (a failure).
Convert the given scale data to ordinal or ranked data, starting with a rank of 1 for the smallest data point.
Find the reliability of the system. If you had a choice of improving system reliability by modifying any two components, how would you proceed?
Identify the relevant population and sampling frame, and indicate an appropriate sampling method for the situations below: (a) The Human Resources Department wish to determine whether single parent employees have a higher rate of absenteeism than m..
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