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Suppose a production facility purchases a particular component part in large lots from a supplier. The production manager wants to estimate the proportion of defective parts received from this supplier. She believes the proportion defective is no more than .20 and wants to be within .02 of the true proportion of defective parts with a 90% level of confidence. How large a sample should she take?
Lynn believes a good presentation will be critical for her to sell Bruce the new display. How should she structure her presentation?
The width of the interval with the finite population correction factor is wider than the confidence interval without the finite population correction factor.
Suppose that Xl. " " XIO form a random sample from a normal distribution for which both the mean and the variance are unknown
1 the speeds of car traveling on interstate highway i-35 are normally distributed with a mean of 74 miles per hour and
What does 95% payback mean in terms of the expected value of a play on the slot machines? i.e. What is the expected value of a pull on the slots?
In June 30, 2012, the Ventura County Star reported that 63% of employers allow employees to work from home sometimes (this is up from 34% in 2005).
He wants to be 95% confident that his estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within $200?
With whom should you consult about design strategies to improve products/services and why would you consult with these individuals or groups?
Using the 0.05 level of significance, and assuming that a random sample of 200 billboards was observed in each city, could the population proportions be equal for billboards advertising alcohol or tobacco products in the three cities?
The Internet site www.golfcourse.com lists 14,938 golf courses by state. It gives a variety of information about each course, including greens fees.
a random sample of size 34 is to be selected from a population that has a mean ? 45 and a standard deviation ? of 10.a
USA Today (February 16, 2012) reported that the percentage of U.S. residents living in poverty was 12.5% for men and 15.1% for women.
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