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Weighing bears. Because of the difficulty of weighing a bear in the woods, researchers caught and measured 54 bears, recording their weight, neck size, length, and sex. They hoped to find a way to estimate weight from the other, more easily determined quantities.
in a study designed to investigate whether chimpanzees could learn sign language four chimps were taught ten signs of
A survey last week revealed that out of 400 viewers contacted, 94 watched the news on WBEN. Can we conclude that the percent of viewers has increased? Use the 0.05 significance level.
underinflated or overinflated tires can increase tire wear and decrease gas mileage. a manufacturer of a new tire
Define the research questions for the identified problem or opportunity - Select the appropriate research methodologies and techniques to use for the research project
In the exercise above, examine the impact of using a truncated exponential distribution Exp(λ) on the variance of the approximation of the tail probability.
when sample data actually occur in pairs an advantage of a paired t-test is that it tends to increase the power of a
We have administered an anxiety test to all members of the class. The mean anxiety score is 71 and the standard deviation is 9. (higher score=higher anxiety)
Formulate the decision-making about the process performance as a hypothesis test, stating the null and the alternative hypotheses.
a consumer testing agency obtains 4 cars randomly from each of the folliwng three makers 1 2 3. we wish to compare
Here are data on attitudes toward coffee filters made of recycled paper. The data was gathered from a random sample. What is the conditional distribution of opinion about quality of recycled coffee filters for buyers?
If the airline industry proudly announces that it has set a new record for the longest period of safe flights, would you be reluctant to fly? Are the airlines due to have a crash? Explain your answer.
Discuss some of the common uses of IQ tests. Do you think that IQ test should be used for these purpose? Does the Flynn effect alter your thoughts about the uses of IQ test? Explain.
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