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There are two local factories that produce microwaves. Each microwave produced at factory A is defective with probability .05, whereas each one produced at factory B is defective with probability .01. Suppose you purchase two microwaves that were produced at the same factory, which is equally likely to have been either factory A or factory B. If the first microwave that you check is defective, what is the conditional probability that the other one is also defective?
What sample size is needed to estimate with 95 persent confidence the mean intake of calcium within 20 units of the true mean if the intake is normal with a variance of 1900 units?
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F (based on data from the University of Maryland researchers).
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
in a trail of 160 patients who received 10-mg doses of a drug daily 40 reported headaches as a side effect. answer a
a machine that cuts corks for wine bottles operates in such a way that the distribution of the diameter of the corks
Change the last number from 257 to 61 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
What is the probability that this process will be stopped within the next hour and what is the variance of the number of defectives in a batch of 15 ?
identify a peer-reviewed journal article published within the last 5 years that uses probabilities. this article should
three balls are randomly chosen without replacement from an urn containing 4 red 3 white and 3 blue balls. suppose that
The local operations manager for the IRS must decide whether to hire 1, 2, or 3 temporary workers. He estimates that net revenues will vary with how well taxpayers comply with the new tax code.
Explain how the margin of error is reported in the article, and how and why the margin of error impacts the results of the study.
If you have a statistical package that computes binomial probabilities, find the probability that at least five funds outperform the market in all 10 years.
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