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1. A particular production process produces bolts whose diameter is a N ( 3, 16) random variable.
(a) Find the probability that a randomly selected bolt will have a diameter less than 3.2.
(b) Find the probability that the average diameter from a sample of 35 bolts will be less than 3.2.
2. Customers arrive at a counter in accordance with a Poisson process of density three arrivals per minute.
(a) What is the expected number of arrivals per minute?
(b) What is the standard deviation of the number of arrivals per minute?
(c) Use the CLT to approximate the probability that the average number of arrivals in 75 I-minute periods is between 2.6 and 3.4.
What symbol is used to represent the mean of the sampling distribution of y-(ybar)? Explain and what symbol is used to represent one value from the sampling distribution of y-(ybar)? Explain
the rank correlation coefficient is used when one isa not interested in drawing inferences from the the studyb
a recent poll of 700 people who work indoors found that 278 smoke. if the researchers want to be 98 confident of their
box 1 contains 1000 bulbs of which 10 are defective. box 2 contains 2000 bulbs of which 5 are defective. two bulbs are
Assume the cholesterol levels of adult American women are normally distributed with a mean of 190 mg/dL and a standard deviation of 26 mg/dL. What level would represent the 10th percentile?
Transportation problem using the stepping stone method
The Defense Logistics Agency Land Maritime (DLA L&M) is the premier logistics agency supplying spare parts to the United States warfighter.
What are the maximum and the minimum values in the entire set of data? List the actual values in the fourth row. List the actual values in the next to the last row.
a random sample of 10 parking meters in a beach community showed the following incomes for a day. assume the incomes
on average a textbook author makes two word processing errors per page on the first draft of her textbook. what is the
Get the data on eruption times and waiting times between eruptions of the Old Faithful geyser from the website. Estimate the mean waiting time and give a standard error for the estimate.
At the level of significance, is there evidence that the population mean force is greater than 1500 pounds?
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