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Consider the population {1, 2, 5, 6, 10, 12}.
(a) Find the sampling distribution of the medians for samples of size 3 without replacement. Display this distribution in the following table
Median Frequency
2
5
6
10
(b) Compare the median of the population to the mean of the medians found in part (a).
What total size sample would be necessary if we wanted to estimate the true proportion to within ±0.08 using 90% confidence?
Normal distribution with a mean of 240 minutes and a standard deviation of 40 minutes, what is the probability of a procedure of this type lasting less than 200 minutes?
The past year and carry out a hypothesis test for its suspicion. State the null hypothesis and the alternative hypothesis that it would use for this test.
The camera department of a large department store sells three different brands of cameras: Proxima, Yakima, and Tetron. Approximately 60% of the cameras sold are Yakimas with Tetrons accounting for 30% of sales and Proxima the remaining 10%.
Best Electronics, Inc. offers a "no hassle" returns policy. The number of items returned per day follows the normal distribution. The mean number of customer returns is 10.4 per day and the standard deviation is 2.3 per day.
A bus company claims that the mean waiting time for a bus during rush hour in less than 7 minutes. A random sample of 20 waiting times has a mean of 5.2 minutes with a standard deviation of 2.1 minutes.
Let A be the event that a randomly chosen employee has a college degree and B the event that the chosen employee's income is more than $50,000.
Determine the probability that adult owns stock and has some college education? Determine the probability that adult owns stock or has some college education?
at baseball practice a batter can swing at a pitch until he gets 3 hits. the probability that he hits a random pitch is
directions answer each of the following questions. show your work or explain how you arrived at your conclusion
Country A and Country C spends about the same amount on average per person per year. Which has the greater spread?
At the 0.01 level of significance, can the student group conclude that there is a difference in average textbook prices for new textbooks sold on campus and over the Internet?
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