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A wine importer needs to report the average percentage of alcohol in bottles of French wine. From experience with previous kinds of wine, the importer believes the population standard deviation is 1.2%.
The importer randomly samples 60 bottles of the new wine and obtains a sample mean x‾= 9.3%. Give a 90% confidence interval for the average percentage of alcohol in all bottles of the new wine.
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
are americas top chief executive officers ceos really worth all that money? one way to answer this question is to look
Compute the incidence proportion or the risk ratio that compares group 1 to group 0, and compute the Incidence proportion or the risk ratio which compares group 2 to group 0. Then post a summary of your findings.
One study, based on responses from 1,015 randomly selected teenagers, concluded that 44% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half of all teenagers in the po..
if 3 different factor levels show a lot of variation between levels this impliesa a large amount of error within each
Using the following data, test the question that an equal number of Democrats, Republicans, and Independents voted during the most recent election.
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P22, the 22-percentile. This is the temperat..
Show that F(x) is a distribution function of a discrete random variable.
Discuss the strategic importance of forecasting. What strategic decisions do organizations need to make in terms of forecasting? What are some examples?
a. What is the mean of the sampling distribution?
A gambler loses 10 times running at roulette. He decides to continue playing because he is due for a win, by the law of averages. A bystander advises him to quit, on the ground that his luck is cold. Who is right? Or are both of them wrong?
what is the probability of obtaining 2 heads out of 5 tosses of a coin in a binomial
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