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Question: A wine taster claims that she can distinguish four vintages of a particular Cabernet. What is the probability that she can do this by merely guessing? (She is confronted with four unlabeled glasses.) The response must be typed, single spaced, must be in times new roman font (size 12) and must follow the APA format.
Construct a 99% confidence interval for the true average amount of time customers spent in the restaurant. With a .99 probability, how large of a sample would have to be taken to provide a margin of error of 2.5 minutes or less?
Suppose we ?ip a coin n times and let p denote the probability of heads. Let X be the number of heads. We call X a binomial random variable, which is discussed in the next chapter.
Suppose that, from a population of 75 bank accounts, we want to take a random sample of six accounts in order to learn about the population. How many different random samples of six accounts are possible?
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
a. For a classification table using the sample proportion of 0.642 as the cutoff, report the sensitivity and specificity. Interpret.b. Form a ROC curve, and report and interpret the area under it.
If 10 workers who have recently changed jobs and had 401(k) plans with accounts less than $5,000 are randomly sampled, what is the probability that exactly 6.
Gold's managers are considering a promotion in which they reward frequent users with a small gift. They have decided that they will only give gifts.
According to recent research from the PewFoundation, 91% of all American adults have cell phones of some type. Use the statistics given to determine the approximate number of American adults who would find giving up their phone more difficult than..
What are some ways in which scientists get ideas for their research?- Why can theories not be proved or disproved by research?
orders for a computer are summarized by the optional features that are requested. the proportion of orders with no
a survey of adults ages 18-29 found that 82 use the internet.you randomly select 196 adults ages 18-29 and ask them if
The power spectrum at the input to an ideal BPF is. - Determine the autocorrelation function of the output. You may have to make a reasonable approximation to obtain a simplified form.
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