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A sample of 1000 college students at NC State University were randomly selected for a survey. Among the survey participants, 102 students suggested that classes begin at 8 AM instead of 8:30 AM. The sample proportion is 0.102.
What is the margin of error for a 99% confidence interval for this sample? Give your answer to three decimal places.
Test the relevant hypotheses using a 5 .05. For purposes of this exercise, assume that it is reasonable to regard the sample
What is the best estimate of the average tread life in miles for the entire population of these tires?
Suppose a baseball pitcher throws fastballs 80% of the time and curveballs 20% of the time. Suppose a batter hits a home run on 8% of all fastball pitches
Estimate the probability the store will gross over $850 a) Fewer than 5 out of 10 business days.
(a) De?ne an appropriate Markov chain to analyze this model. (b) Show that this Markov chain is time reversible. (c) Find the long-run probabilities.
A random sample of 100 people in the United States reveals that their mean "amount to feel rich" is $2.3 million and the standard deviation is $0.5 million. Conduct the test.
the journal of research in crime and delinquency has published a study on the situational characteristics of crimes. in
mr. brown owns two furniture stores. in store 1 the number of sofas sold per week by a salesperson is on average 13 per
The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. What is the probability that 4 or more of the calculators will be defective?
a) Explain why it would be hard to take a Simple Random Sample? b) Describe how to take a cluster sample of chocolate chip cookies.
A researcher randomly assigned 160 subjects into one of two groups: Atkins diet or Weight Watchers.
A particular factory can only inspect 46 mice per hour with a standard deviation of 10. At alpha=0.02 company have reason to believe that these inspectors are slower than average?
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