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An optical ?rm buys glass slabs to be ground into lenses, and it is known that the variance of the refractive index of the glass slabs is to be no more than 1.04 × 10-3. The ?rm rejects a shipment of glass slabs if the sample variance of 16 pieces selected at random exceeds 1.15 × 10-3. Assuming that the sample values may be looked on as a random sample from a normal population, what is the probability that a shipment will be rejected even though σ2 = 1.04 × 10-3?
question a researcher wants to conduct a beforeafter study on 15 subjects to determine if a treatment results in any
While in Paymor Hospital such exams were given in 110 out of 200 cases. In a left-tailed test for equality of proportions, the p-value is?
We are intersted in the number of students who prefer brand C cola. identify the distribution of the random variable and the mean,standard deviation.
where phi = golden ratio. What is the long-term fraction of time the chain spends in each of the states? Answer must be gotten without a calculator.
mr. brown owns two furniture stores. in store 1 the number of sofas sold per week by a salesperson is on average 13 per
Use the Internet to find a website that shows an example or application correlation or regression in the area of your interest or in your profession. Discuss how correlation or regression was used and summarize your finding.
10. 3.52 8.87 3.99 3.61 2.33 3.21 0.25 4.94use the sample data to construct a 95 confidence interval estimate of the
Find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses are made and each question has 3 possible answers.
The mean arrival rate is 15 cars per hour. What is the probability that 20 or more cars will arrive during any given hour of operation?
It would like to be plus or minus $10 of the true mean with a 98% confidence level. The standard deviation is thought to be $500. How many card holders should be sampled?
a pet company has a business objective of expanding its product line beyond its current kidney- and shrimp-based cat
From an inventory of 48 cars being shipped to local automobile makers, 12 have defective radios installed. What is the probability that one particular dealership receiving 8 cars will find 2 radios being defective? Make assumptions if necessary.
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