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Suppose that waiting times at the DMV are normally distributed with a mean of 32.8 minutes and a standard deviation of 3.2 minutes. Out of 1000 randomly selected people at the DMV, about how many would be expected to have to wait i) between 26.4 and 32.8 minutes? ii) longer than 39.2 minutes.
Does this data indicate that the sentiment for increasing the speed limit is different for the two groups of residents? Let p1 refer to the urban population.
Explain why a confidence interval for a predictor coefficient is equivalent to a 2-tailed test of significance?
Describe what do you mean by terms 'false positive" and " false negative".
A company owns 400 laptops. Each laptop has an 8% probability of not working. You randomly select 20 laptops for your salespeople. What is the likelihood that they will all be broken?
Draw suitable distribution curve indicating position of the TS and CV.
Is there any evidence that the different teatments produced different responses? If so, which one seems to work best?
4 clothing manufacturer tests SRS of 5 specimens of each fabric. Determine the probability that mean breaking strength of 5 untreated specimens exceeds 50 pounds?
The probability that at least 5 children out of 10 in a sample taken from a school may have a blood level that may impair development is?
Consider the trash bag problem. Suppose that an independent laboratory has tested trash bags and has found that no 30-gallon bags that are currently on the market have a mean breaking strength of 50 pounds or more.
In what situations might you use probability as a manager to approach business-related problems? What are the advantages to using probability concepts in business decisions?
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
30% of the time the wife is listening to the radio. Find the probability that:a. If the wife is listening to the radio, the husband is also listening to the radio.
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