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At a large university it is known that 50% of the students live on campus. The director of student life is going to take a random sample of 200 students. Which of the following is most likely to occur.
Select one:
The sample proportion falls between 0.5 and 0.7
The sample proportion falls between 0.3 and 0.5
The sample proportion falls between 0.4 and 0.6
The sample proportion falls between 0.45 and 0.55
1. you are trying to determine the average age of students at cuyamaca college. the average age of 50 randomly selected
Use a 0.01 significance level to test the claim that most people believe that the Loch Ness monster exists. How is the conclusion affected by the fact that Internet users who saw the question could decide whether to respond.
a marketing research firm is interested in determining whether there is difference between households in chicago and
The unlikelihood of everyone who plays the lottery choosing a correct 6 would be very large indeed. Is this unethical advertising? Is it misleading? is the lottery in general, unethical? Why or why not?
Suppose the population standard deviation is 0.3 minutes and the sample mean is 9.975. A 90-percent confidence interval for the true mean delivery time is?
Suppose that you go out to sauerkraut pizza with two friends. you have agreed to the following rule to decide who will pay the bill. each person will toss a coin. the person who gets a result that is different from the other teo will pay the bill...
Explain why random samples are preferred to nonrandom samples.
If the goal is to test whether less than 75% of the flights depart on time, what is the value of the critical test statistic at the 10% level of significance?
Other questions we might want to ask about pooling similar populations: Do all the subpopulations have the same ratio of yellow to green seeds? Does the average ratio deviate from our hypothesized ratio?
Identify the null and alternative hypothesis, test statistics, p-value or critical value(s), conclusion about the null hypotesis and final conclusion that address the original claim.
the depot is using a standard of 635 hours for a particular modification effort. you are to review the standard and
At a 5% level of significance, is there sufficient evidence that the population mean waiting time is now less than 3.7 minutes?
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