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A cola dispensing machine is set to dispense 9 oz. of cola per cup, with a standard deviation of 1 oz. The manufacturer sould like to set the control limit in a way that , for samples of 32, 5% of the sample means will be greater than the upper control limit, and 5% of the sample means will be less than the lower control limit.
a) At what value should the control limit be set?
"Values should be inbetween ____ and ____"
b) What is the probability that if the population mean shifts to 8.6, this change will not be detected?
c) What is the probability that if the population mean shifts to 9.7, this change will not be detected?
Woodco manufactures tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pine. A total of 150 board feet of oak and 210 board feet of pine are available.
An insurance company states that 90% of its claims are settled within 5 weeks. A consumer group selected a random sample of 100 of the company's claims and found 75 of the claims were settled within 5 weeks.
tudent from the high school is arbitarily selected. Reply the following questions: Determine the probability that the student's ACT score is less than 22?
Determine if the tires were exceeding the guarantee. At the .05 significant level, it was concluded that the tires are exceeding the manufacturer's guarantee.
Quality Progress, February 2005, reports on improvements in customer satisfaction and loyalty made by Bank of America. A key measure of customer satisfaction is the response (on a scale from 1 to 10) to the question
Make three-month and four-month moving averages for this time series. Does the three-month or four month moving average provide the better forecast? Explain.
Flu cases this past season in the Oshkosh school system were about 15 per week. For the entire state, the weekly average is 16 and the standard deviation, 2.35.
Past studies have shown that only 95% of booked passengers actually show up for the flight. What is the probability that exactly 99 booked passengers actually show up for the flight?
according to a 2003 national household survey on drug use and health 263 out of 1546 randomly selected americans
How to explain the influences on z-scores with constant variables in hypothesis tests with
A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12.
we have a bag with 10 red 10 blue and 20 green marbles. you draw two marbles out of this bag without replacement. what
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