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The article "Freedom of What?" (Associated Press, February 1, 2005) described a study in which high school students and high school teachers were asked whether they agreed with the following statement: "Students should be allowed to report controversial issues in their student newspapers without the approval of school authorities." It was reported that 58% of the students surveyed and 39% of the teachers surveyed agreed with the statement. The two samples-10,000 high school students and 8000 high school teachers-were selected from 544 different schools across the country. Use the given information to determine if there is convincing evidence that there is a difference between the proportion of high school students who agree that students should be allowed to report controversial issues in their student newspapers without the approval of school authorities, p1, and the proportion of high school teachers who agree with the statement, p2. Use a significance level of .05.
you are going to toss a coin repeatedly in successive trials until you get a head for the first time and then you are
For each stratum, estimate the total number of claims that would not be allowed if all claims in the stratum had been audited
the number of traffic accidents at a certain intersec- tion is thought to be well modeled by a poisson process with a
the standard deviation of a distribution is 20. if a sample of 225 is selected what is the standard error of the
Refer to the box plot below to answer the questions. If a data point that was originally 13 is changed to 14, how would the box plot be affected?
Calculate the standard error. With 95% confidence, find out the margin of error?
the weights of cans of soup produced by a company are normally distributed with a mean of 15g and a standard deviation
1) Ace Car Rental has three main models that are used in it midsize range of cars. The cars are very similar and perform at about the same level. Since the customer has to pay for the gas use during the rental period, the manager is often asked about..
1 a factorys soft drink machine is set to put 335 ml of soda on avaerage in each can with a standard deviation of 26
a random sample of 30 students results in a sample mean age of 20 years with a sample standard deviation of 1.5 years.
Create a contingency table similar to that in Figure 5.6 with the Admission Rank numbers as row titles and the Bed Count Rank numbers as the column labels.
What are the mean value and standard deviation of the number of students who want new books? What is the probability that the number of students who want new books is more than two standard deviations above the mean?
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