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Express the null hypothesis and the alternative hypothesis in symbolic form. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is less than 2 in every one thousand.
Why does Bob continue to play the video game even after losing $300?
Find a two-sided 95% confidence interval for the mean dissolved oxygen and interpret it.- What assumptions do you need to make to answer part (a)?
Describe how you would collect your data, the level of measurement of your data, and which statistical technique you would use to analyze the data. Explain why you chose that statistical technique.
a sociologist studying the justice system has just written a paper detailing her findings after she examined the
read and answer the following questions for this onelets talk a little bit about accuracy. when you fit a
A player throws a fair coin and wins $1 each time it's heads, but loses $1 each time it's tails. The player will stop when his or her net winnings reach $1, or after n throws, whichever comes sooner. What is the player's probability of winning, an..
Of all 3 to 5 year old children, 56% are enrolled in school. A sample of 500 children age 3 to 5 year old is ramndom selected. Find the probability that at least 250 children are enrolled in school.
Suppose a simple random sample of 30 days is selected for observation. What is the probability that the sample mean for the 30 days will be between 300 and 340 books?
At the 0.05 level, is the 40% rate significantly greater than the 35% that had been occurring in the past, or might this higher rate be simply due to chance variation? Identify and interpret the p-value for the test.
a consumer interest group wishes to compare the effectiveness of three competing brands of medicine. they take a random
What are the mean and median starting salaries? Which schools have the minimum and maximum starting salaries?
Give a real world example of a situation where normal parametric tests would not be useful and where there is a need for nonparametric test methods. Be specific and explain why nonparametric tests are needed in that case.
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