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What is the fraction defective if material hardness is normally distributed with a mean of 42 and a standard deviation of 1 and the specification limits for hardness are from 35 to 45? What value for the process mean will minimize the fraction defective? Please include the formula/steps taken to reach the answer.
What is the effect on a confidence interval if one decreases both sample size and the level of confidence?
A poll of 1,068 adult Americans reveals that 52% of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 significance level, test the claim that more than half of all voters prefer the Democrat.
7% chance of making $40,000; a 20% chance of making $10,000; and 70% chance of making $0. How much should you be willing to pay for this deal?
It was determined that 53 of the patients had been readmitted to the program at least once. At the 95% level, construct an estimate for the population.
question sadik inc.s bonds currently sell for 1280 and have a par value of 1000. they pay a 135 annual coupon and have
The ages of the individuals and initial mode of gambling was recorded. The ages for those who gamble online and in public are shown in the table. On the basis of the data provided, can you conclude that online gambling is more prevalent among indi..
It has been found that the weight of rice the machine puts into a bag is normally distributed with standard deviation of 0.1 kg.
If 20 randomly selected pine trees are tested for infection by the pine beetle, what is the probability that fewer than 2 are infected by the pine beetle?
Assuming 250 of each sex, can we conclude that there is a significant difference in the proportions at a 0.05 level of significance?
suppose the heights of american men are normally distributed with the mean of 68 inches and standard deviation of 2.5.
question you are given a large sample of data to analyse using regression analysis.a firstly you wish to discover
consider an x-bar chart where the x-bar statistic is normally distributed and an associated x-bar control chart exists.
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